Unknown Facts: Hardest Biology Quiz!
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What is the green color in plants named?
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Chlorophyll
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Starch
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Sebum
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Sap
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About This Quiz
Do you believe that you can pass this most challenging biology quiz? There are so many applications of biology in solving health problems. For example, analgesics affect calming pain while antiseptics reduce or halt micro-organisms' growth. From biology, vaccines have been created to fight against diseases, reducing mortality rates. This remarkable hardest biology quiz is the ideal way to test See moreyour knowledge; good luck.
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- 2.
What cell component is commonly used for personal identification?
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DNA
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RNA
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REM
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Amino Acid
Correct Answer
A. DNAExplanation
DNA is commonly used for personal identification because it contains unique genetic information that is specific to each individual. DNA profiling, also known as DNA fingerprinting, compares specific regions of an individual's DNA to determine their identity. This method is highly accurate and reliable, making it a widely used tool in forensic science, paternity testing, and other applications where personal identification is required. RNA, REM, and amino acids do not possess the same level of uniqueness and specificity as DNA, making them less suitable for personal identification purposes.Rate this question:
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- 3.
What filters the blood to excrete harmful substances in the form of urine?
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Kidneys
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Lungs
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Intestines
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Gallbladder
Correct Answer
A. KidneysExplanation
The kidneys are responsible for filtering the blood to remove harmful substances and waste products, which are then excreted in the form of urine. The kidneys play a crucial role in maintaining the body's overall balance of fluids, electrolytes, and pH levels. They filter the blood by removing toxins, excess water, and metabolic waste products, while reabsorbing essential substances like glucose and amino acids. The filtered waste is then transported to the bladder as urine, which is eventually eliminated from the body.Rate this question:
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- 4.
Which of these is the largest bone in the human body?
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Femur
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Tibia
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Humorous
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Ulna
Correct Answer
A. FemurExplanation
The femur is the largest bone in the human body. It is located in the thigh and extends from the hip to the knee. The femur is responsible for supporting the weight of the body and plays a crucial role in walking, running, and other lower body movements. It is also the strongest bone in the body, designed to withstand the forces exerted on it during daily activities.Rate this question:
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- 5.
How many chambers is the heart divided into?
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4
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3
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2
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6
Correct Answer
A. 4Explanation
The heart is divided into four chambers: two atria and two ventricles. The atria receive blood from the body and lungs, while the ventricles pump blood out to the body and lungs. This division of chambers allows for efficient circulation of oxygenated and deoxygenated blood throughout the body.Rate this question:
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- 6.
What is the nerve from the eye to the brain?
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Optic
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Auditory
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Dilator
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Renal
Correct Answer
A. OpticExplanation
The optic nerve is the nerve that carries visual information from the eye to the brain. It is responsible for transmitting signals that allow us to see and perceive our surroundings.Rate this question:
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- 7.
In the human body, the optic nerve sends signals from the eye to what?
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Brain
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Stomach
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Hands
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Nose
Correct Answer
A. BrainExplanation
The optic nerve is responsible for transmitting visual information from the eye to the brain. It carries signals that allow us to see and interpret the world around us. The brain then processes these signals and allows us to perceive and make sense of what we are seeing. Therefore, the correct answer is Brain.Rate this question:
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- 8.
What molecule in the blood carries oxygen?
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Hemoglobin
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Rydberg molecule
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Hyrdogen
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Sodium Chloride
Correct Answer
A. HemoglobinExplanation
Hemoglobin is the correct answer because it is a protein found in red blood cells that binds to oxygen and carries it throughout the body. It has a high affinity for oxygen, allowing it to pick up oxygen in the lungs and release it in tissues that need it. Hemoglobin is essential for the transportation of oxygen from the lungs to the rest of the body, ensuring that cells receive the oxygen they need for energy production.Rate this question:
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- 9.
What is Botany the study of?
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Plants
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Insects
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Bottles
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Seeds
Correct Answer
A. PlantsExplanation
Botany is the study of plants. It involves the scientific study of plant life, including their structure, growth, reproduction, physiology, and classification. Botanists study various aspects of plants, such as their anatomy, genetics, ecology, and evolution. They also investigate plant diseases, develop new plant varieties, and explore the potential uses of plants in medicine, agriculture, and industry.Rate this question:
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- 10.
Who has more bones?
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A baby
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An adult
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A teenager
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A senior
Correct Answer
A. A babyExplanation
A baby has more bones compared to an adult, teenager, or senior. This is because babies are born with around 300 bones, which gradually fuse together as they grow. By adulthood, the number of bones decreases to approximately 206 due to the fusion of certain bones. Therefore, a baby has more bones than any of the other age groups mentioned.Rate this question:
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- 11.
In which process do plants bend toward light?
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Phototropism
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Geotropism
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Gravitropism
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Heliotropism
Correct Answer
A. PhototropismExplanation
Phototropism is the correct answer because it refers to the process by which plants bend or grow towards a source of light. This response is triggered by the hormone auxin, which is produced in higher concentrations on the shaded side of the plant. As a result, cells on that side elongate, causing the plant to bend towards the light. Geotropism, gravitropism, and heliotropism are not relevant to the bending of plants towards light.Rate this question:
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- 12.
The cells of human males have what two chromosomes?
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One X and One Y
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Two X chromosomes
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Two Y chromosomes
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One X and One Z
Correct Answer
A. One X and One YExplanation
Human males have one X and one Y chromosome. This is because males inherit one sex chromosome from each parent. Females inherit two X chromosomes, while males inherit one X chromosome from their mother and one Y chromosome from their father. The presence of the Y chromosome determines the development of male characteristics.Rate this question:
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- 13.
What is 70% of the human body made of?
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Water
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Skin
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Blood
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Muscle
Correct Answer
A. WaterExplanation
The human body is made up of approximately 70% water. Water is essential for various bodily functions such as maintaining body temperature, transporting nutrients, lubricating joints, and removing waste. It is present in cells, tissues, and organs, and plays a vital role in overall health and well-being. Therefore, water is the correct answer to the question.Rate this question:
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- 14.
What is the largest organ in the human body?
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Skin
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Bone
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Gland
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Liver
Correct Answer
A. SkinExplanation
The largest organ in the human body is the skin. It covers the entire body and acts as a protective barrier against external factors such as bacteria, viruses, and physical injuries. The skin also helps regulate body temperature, excretes waste through sweat, and contains sensory receptors that allow us to feel touch, pain, and temperature. Additionally, the skin plays a role in synthesizing vitamin D when exposed to sunlight.Rate this question:
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- 15.
Where in the human body would you find your Adam's Apple?
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Neck
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Stomach
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Brain
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Leg
Correct Answer
A. NeckExplanation
The Adam's Apple is a prominent feature in the neck area of the human body. It is formed by the thyroid cartilage, which is more prominent in males than in females. The Adam's Apple is responsible for producing deeper voices in males as it enlarges during puberty. Therefore, it is located in the neck region, making the correct answer "Neck".Rate this question:
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- 16.
What is the biggest organ in the human body?
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Skin
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Heart
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Brain
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Lungs
Correct Answer
A. SkinExplanation
The skin is the largest organ in the human body. It covers the entire body and has a surface area of about 20 square feet. The skin serves as a protective barrier, regulating body temperature, and preventing the loss of essential fluids. It also plays a crucial role in sensing touch, pain, and pressure. Additionally, the skin helps in the production of vitamin D when exposed to sunlight. Overall, the skin is essential for the body's overall health and well-being.Rate this question:
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- 17.
What is the longest bone in the human body?
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Femur
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Tibia
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Fibula
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Humerus
Correct Answer
A. FemurExplanation
The femur is the longest bone in the human body. It is located in the thigh and extends from the hip to the knee. The length of the femur allows it to support the weight of the body and provide stability and mobility for walking and running. The femur is also one of the strongest bones in the body, as it needs to withstand the forces exerted on it during everyday activities.Rate this question:
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- 18.
The death of an entire species is called what?
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Extinction
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Evolution
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Extermination
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Infection
Correct Answer
A. ExtinctionExplanation
Extinction refers to the death or disappearance of an entire species. It occurs when there are no remaining individuals of a particular species alive. This can happen due to various reasons such as habitat destruction, climate change, natural disasters, or human activities. Extinction is a natural process that has been occurring throughout the history of life on Earth, but it is currently happening at an alarming rate due to human-induced factors.Rate this question:
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- 19.
Which organism is helpful in making the soil fertile ?
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Earthworm
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Roundworm
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Beetle
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Ringworm
Correct Answer
A. EarthwormExplanation
Earthworms are helpful in making the soil fertile because they burrow through the soil, creating tunnels that allow air and water to penetrate deeper into the ground. They also consume organic matter such as dead leaves and plant debris, breaking it down into smaller particles. This process, known as decomposition, releases nutrients back into the soil, making them available for plants to absorb. Additionally, earthworms excrete nutrient-rich castings, which further enrich the soil with organic matter and beneficial microorganisms. Overall, the activities of earthworms enhance soil structure, nutrient cycling, and overall fertility.Rate this question:
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- 20.
What is a more scientific term for "high blood pressure"?
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Hypertension
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COPD
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Asthma
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Heart attack
Correct Answer
A. HypertensionExplanation
Hypertension is the more scientific term for "high blood pressure." It refers to a medical condition in which the force of blood against the walls of the arteries is consistently too high. This can lead to various health problems, such as heart disease, stroke, and kidney failure. COPD, asthma, and heart attack are unrelated to high blood pressure and do not serve as scientific terms for it.Rate this question:
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- 21.
Which blood group is known as the 'Universal Donor' ?
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Group O
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Group A
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Group AB
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Group B
Correct Answer
A. Group OExplanation
Group O is known as the 'Universal Donor' because it does not have the A or B antigens on its red blood cells. This means that it can be safely transfused to individuals with any blood type without causing an immune reaction. However, individuals with blood type O can only receive blood from other individuals with blood type O, making it the universal donor but also the universal recipient.Rate this question:
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- 22.
In humans, males have which chromosomes?
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XY
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XX
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YY
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ZW
Correct Answer
A. XYExplanation
In humans, males have XY chromosomes. This is because males inherit one X chromosome from their mother and one Y chromosome from their father. The presence of the Y chromosome determines the development of male characteristics during embryonic development. On the other hand, females have XX chromosomes, inheriting one X chromosome from each parent. The combination of XX chromosomes in females leads to the development of female characteristics.Rate this question:
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- 23.
How many lungs in a human body?
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2
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1
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4
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8
Correct Answer
A. 2Explanation
The correct answer is 2 because a human body typically has two lungs. The lungs are essential organs responsible for breathing, oxygenating the blood, and removing carbon dioxide. Each lung is located in the chest cavity, with the right lung having three lobes and the left lung having two lobes. Together, they enable the exchange of gases and play a vital role in the respiratory system.Rate this question:
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- 24.
How many chromosomes are in the human gene?
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46
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24
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36
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61
Correct Answer
A. 46Explanation
The correct answer is 46 because humans typically have 23 pairs of chromosomes, for a total of 46 chromosomes. Each pair consists of one chromosome inherited from the mother and one from the father. These chromosomes contain the genetic information that determines our traits and characteristics.Rate this question:
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- 25.
How many pairs of chromosomes does the normal human have?
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23
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12
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34
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45
Correct Answer
A. 23Explanation
The normal human has 23 pairs of chromosomes. Each pair consists of two chromosomes, one inherited from each parent, resulting in a total of 46 chromosomes. These chromosomes contain the genetic information that determines various traits and characteristics of an individual.Rate this question:
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- 26.
What cell feature is responsible for powering a cell?
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Mitochondria
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Golgi apparatus
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Endoplasmic reticulum
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Ectoplasm
Correct Answer
A. MitochondriaExplanation
Mitochondria are responsible for powering a cell. They are often referred to as the "powerhouses" of the cell because they generate most of the cell's supply of adenosine triphosphate (ATP), which is the molecule that provides energy for cellular processes. Mitochondria have their own DNA and are capable of producing their own proteins, allowing them to carry out their energy-producing functions independently.Rate this question:
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- 27.
If you take a class in Mycology, what are you studying?
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Fungi
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Flowers
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Spider webs
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Clouds
Correct Answer
A. FungiExplanation
If you take a class in Mycology, you are studying fungi. Mycology is the branch of biology that deals with the study of fungi, including their identification, classification, and biology. Fungi are a diverse group of organisms that include mushrooms, yeasts, molds, and lichens. They play important roles in various ecosystems, as decomposers, pathogens, and symbiotic partners. By studying fungi, scientists can gain a better understanding of their ecological significance, their impact on human health, and their potential applications in various industries such as medicine and agriculture.Rate this question:
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- 28.
What metal is present in hemoglobin?
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Iron
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Copper
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Calcium
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Gold
Correct Answer
A. IronExplanation
Hemoglobin is a protein found in red blood cells that is responsible for transporting oxygen throughout the body. It contains a heme group, which consists of an iron ion coordinated to a porphyrin ring. This iron ion is crucial for the binding and transport of oxygen. Therefore, the metal present in hemoglobin is iron.Rate this question:
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- 29.
Which is longer: the large or small intestine?
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Small
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Large
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They are the same
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Don't choose this answer!
Correct Answer
A. SmallExplanation
The small intestine is longer than the large intestine. The small intestine measures about 20 feet long, while the large intestine is approximately 5 feet long.Rate this question:
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- 30.
What is the correct name for the nerve cell?
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The neuron
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The nerve
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The responder
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The neural link
Correct Answer
A. The neuronExplanation
The correct name for the nerve cell is the neuron. The term "neuron" refers to the specialized cells in the nervous system that transmit information through electrical and chemical signals. Neurons are responsible for processing and transmitting information, allowing for communication between different parts of the body and the brain.Rate this question:
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- 31.
What method is used to kill the bacteria in milk ?
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Pasteurization
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Immunization
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Sterilization
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Chlorination
Correct Answer
A. PasteurizationExplanation
Pasteurization is the method used to kill bacteria in milk. This process involves heating the milk to a specific temperature for a certain period of time to effectively destroy harmful bacteria while preserving the nutritional value and taste of the milk. Immunization is a method used to stimulate the immune system to protect against specific diseases, not to kill bacteria in milk. Sterilization is a process that completely eliminates all forms of life, including bacteria, but it is not commonly used for milk as it would also destroy its nutritional value. Chlorination is a method used to disinfect water, not milk.Rate this question:
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- 32.
Which of these diseases is airborne?
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Bronchitis
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Arthritis
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Malaria
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Lung Cancer
Correct Answer
A. BronchitisExplanation
Bronchitis is an inflammation of the bronchial tubes, which carry air to the lungs. It can be caused by viruses or bacteria, and is often spread through airborne droplets when an infected person coughs or sneezes. This means that the disease can be transmitted through the air, making it airborne. Arthritis, Malaria, and Lung Cancer are not airborne diseases as they are not spread through the air.Rate this question:
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- 33.
In humans, females have which chromosomes?
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XX
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XY
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YY
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ZW
Correct Answer
A. XXExplanation
Females have two X chromosomes, which is denoted as XX. This is because females inherit one X chromosome from their mother and one X chromosome from their father. The presence of two X chromosomes determines the female sex.Rate this question:
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- 34.
A baby has 270 bones. How many bones does an adult have?
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206
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256
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306
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356
Correct Answer
A. 206Explanation
As a person grows from a baby to an adult, some of their bones fuse together. This process, known as ossification, reduces the overall number of bones in the body. Therefore, an adult has 206 bones, which is the correct answer.Rate this question:
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- 35.
What disease causes rapid and uncontrolled growth of abnormal cells?
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Cancer
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Leprosy
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Hemophilia
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Malaria
Correct Answer
A. CancerExplanation
Cancer is a disease that causes rapid and uncontrolled growth of abnormal cells. These cells divide and spread uncontrollably, forming tumors that can invade nearby tissues and spread to other parts of the body. Cancer can affect any part of the body and is caused by a combination of genetic mutations, environmental factors, and lifestyle choices. It is a serious and potentially life-threatening condition that requires medical intervention for diagnosis, treatment, and management.Rate this question:
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- 36.
What is the largest and longest bone in the human body?
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The femur
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The spinal cord
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The humorous
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The patella
Correct Answer
A. The femurExplanation
The femur is the largest and longest bone in the human body. It is located in the thigh and extends from the hip to the knee. The femur is responsible for supporting the weight of the body and plays a crucial role in walking, running, and other movements. Its size and length make it the largest bone, while its strength and structure allow it to withstand the forces exerted on it during daily activities.Rate this question:
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- 37.
What is the hardest substance in the human body?
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Tooth enamel
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Knee bone
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Skull bone
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Chin
Correct Answer
A. Tooth enamelExplanation
Tooth enamel is the hardest substance in the human body. It is the outermost layer of the tooth and protects the underlying dentin and pulp. Enamel is composed of minerals, primarily hydroxyapatite, which makes it extremely durable and resistant to wear and tear. It is even stronger than bone and can withstand the forces of biting and chewing. Its hardness and strength allow it to protect the teeth from decay and damage, making it the toughest substance in the human body.Rate this question:
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- 38.
What bone is located in the collar region?
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Clavicle
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Hyoid
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Temporal
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Frontal
Correct Answer
A. ClavicleExplanation
The bone located in the collar region is the clavicle. The clavicle, also known as the collarbone, is a long bone that connects the shoulder to the sternum. It is easily visible and palpable, forming a prominent bump at the top of the chest. The clavicle plays a crucial role in stabilizing the shoulder joint and allowing for a wide range of arm movements.Rate this question:
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- 39.
What bone is located in the upper jaw?
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Maxilla
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Clavicle
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Femur
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Frontal
Correct Answer
A. MaxillaExplanation
The maxilla is the correct answer because it is a bone that is located in the upper jaw. It is a paired bone that forms the upper part of the jaw and contains the upper teeth. The maxilla also contributes to the formation of the nasal cavity, orbits, and the roof of the mouth. The clavicle is a bone that is located in the shoulder region, the femur is the thigh bone, and the frontal bone is located in the forehead region of the skull.Rate this question:
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- 40.
What disease causes yellowing of the eyes, skin and urine?
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Jaundice
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Malaria
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Cancer
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Cholera
Correct Answer
A. JaundiceExplanation
Jaundice is a condition that causes yellowing of the eyes, skin, and urine. It occurs when there is a buildup of bilirubin, a yellow pigment, in the bloodstream. This can happen due to various reasons such as liver disease, hepatitis, or obstruction of the bile ducts. The yellowing of the eyes, skin, and urine is a characteristic symptom of jaundice, making it the correct answer to the question. Malaria, cancer, and cholera do not typically cause yellowing of the eyes, skin, and urine.Rate this question:
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- 41.
Scurvy is caused by a deficiency of what?
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Vitamin C
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Vitamin D
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Potassium
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Calcium
Correct Answer
A. Vitamin CExplanation
Scurvy is a disease that is caused by a deficiency of Vitamin C. Vitamin C is essential for the production of collagen, which is a protein that helps in the formation of connective tissues, skin, blood vessels, and bones. A deficiency of Vitamin C leads to symptoms like weakness, fatigue, swollen and bleeding gums, joint pain, and impaired wound healing, which are characteristic of scurvy. Therefore, the correct answer is Vitamin C.Rate this question:
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- 42.
What part of a cell is responsible for storing water?
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Vacuole
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Mitochondria
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Lysosome
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Ectoplasm
Correct Answer
A. VacuoleExplanation
The vacuole is responsible for storing water in a cell. It is a membrane-bound organelle that can occupy a significant portion of the cell's volume. The vacuole acts as a storage compartment for water, ions, nutrients, and waste products. It helps maintain the cell's turgor pressure, which is crucial for cell shape and stability. Additionally, the vacuole can also store pigments, toxins, and other substances that the cell needs to keep separate from its cytoplasm. Overall, the vacuole plays a vital role in regulating the cell's internal environment and maintaining its overall function.Rate this question:
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- 43.
What are leukocytes?
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White blood cells
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Red blood cells
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Liver cells
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Platelets
Correct Answer
A. White blood cellsExplanation
Leukocytes, also known as white blood cells, are an essential part of the immune system. They play a crucial role in defending the body against infections and diseases. Unlike red blood cells, which carry oxygen, leukocytes are responsible for identifying and destroying harmful pathogens, such as bacteria and viruses. They are produced in the bone marrow and circulate throughout the body, patrolling for any signs of infection or inflammation. Therefore, leukocytes are the correct answer to the question.Rate this question:
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- 44.
Which part of the respiratory tract is also known as the voice box?
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Larynx
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Trachea
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Epiglottis
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Pharnyx
Correct Answer
A. LarynxExplanation
The correct answer is Larynx. The larynx is a part of the respiratory tract that is commonly referred to as the voice box. It is located between the pharynx and the trachea and plays a crucial role in producing sound and allowing us to speak. The larynx contains the vocal cords, which vibrate as air passes through, producing sound waves that form our voice.Rate this question:
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- 45.
What are your nails made of?
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Keratin
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Gelatin
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Cholesterol
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Calcium
Correct Answer
A. KeratinExplanation
Nails are made of keratin, a tough and protective protein that is also found in hair and the outer layer of our skin. Keratin provides strength and structure to the nails, allowing them to grow and protect the sensitive nail bed underneath. Gelatin, cholesterol, and calcium do not play a role in the composition of nails.Rate this question:
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- 46.
What do animal cells NOT contain?
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Cell walls
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Ribosomes
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Plasma
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Mitochondria
Correct Answer
A. Cell wallsExplanation
Animal cells do not contain cell walls. Cell walls are a rigid layer that surrounds the cell membrane in plant cells, fungi, and bacteria. However, animal cells do have a plasma membrane, ribosomes, and mitochondria. The plasma membrane is a selectively permeable barrier that controls the movement of substances in and out of the cell. Ribosomes are responsible for protein synthesis, and mitochondria are the powerhouse of the cell, producing energy in the form of ATP.Rate this question:
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- 47.
What is the largest artery in the body?
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Aorta
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Coronary Artery
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Pulmonary Artery
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Renal Artery
Correct Answer
A. AortaExplanation
The aorta is the largest artery in the body. It is responsible for carrying oxygenated blood from the heart to all parts of the body. It originates from the left ventricle of the heart and branches out into smaller arteries to supply blood to various organs and tissues. The aorta plays a crucial role in maintaining blood circulation and delivering oxygen and nutrients to the body's cells.Rate this question:
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- 48.
Which term means "weakening of the bones"?
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Osteoperosis
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Arteriosclerosis
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Laryngitis
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Colitis
Correct Answer
A. OsteoperosisExplanation
Osteoperosis is the correct answer because it refers to a medical condition characterized by the weakening of the bones. It is a condition that occurs when the body loses too much bone mass or makes too little bone, resulting in brittle and fragile bones that are more prone to fractures. Arteriosclerosis refers to the hardening and narrowing of the arteries, laryngitis refers to inflammation of the larynx, and colitis refers to inflammation of the colon.Rate this question:
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- 49.
Which cell feature is responsible for making proteins?
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Ribosomes
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Lysosomes
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Mitochondria
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Nucleus
Correct Answer
A. RibosomesExplanation
Ribosomes are responsible for making proteins. They are small organelles found in the cytoplasm of a cell. Ribosomes read the genetic instructions from the DNA in the nucleus and use this information to assemble amino acids into proteins through a process called translation. This process is essential for the synthesis of proteins, which are crucial for various cellular functions and structures. Lysosomes are responsible for digestion and waste removal, mitochondria produce energy, and the nucleus contains the genetic material.Rate this question:
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