Grade 9 Biology Quiz Questions And Answers

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Stephen Reinbold, PhD, Biological Sciences |
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Stephen Reinbold has a Ph.D. in Biological Sciences with a particular interest in teaching. He taught General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology for almost thirty years at Metropolitan Community College in Kansas City, Missouri. He particularly enjoyed emphasizing scientific methodology and student research projects. Now, enjoying retirement, he works part-time as an editor while also engaging in online activities.
, PhD, Biological Sciences
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Grade 9 Biology Quiz Questions And Answers - Quiz

An interestingGrade 9 biology quiz is here for you. Do you know anything about 9th-grade biology, and do you think you can pass this quiz? A central theme that organizes the concept in biology is that life changes and progresses through evolution and that all life forms known have a common origin. The theory of evolution says that all organisms on earth, both living and extinct, have come from a shared ancestor. If you want to learn more about 9th-grade biology, try this quiz.


Grade 9 Biology Questions and Answers

  • 1. 

    The 'photo' in photosynthesis means....

    • A.

      Light

    • B.

      Dark

    • C.

      Light and dark

    • D.

      None of the above

    Correct Answer
    A. Light
    Explanation
    In photosynthesis, the term "photo" is derived from the Greek word for light. Photosynthesis is a complex process carried out by plants, algae, and certain bacteria, where light energy is captured and utilized to convert carbon dioxide and water into glucose and oxygen. Light plays a central role in the initial phase, where pigments such as chlorophyll absorb light energy during the photochemical reactions, initiating the conversion of light energy into chemical energy stored in glucose molecules. The prefix "photo-" in photosynthesis emphasizes the essential role of light in driving this vital biological process.

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  • 2. 

    What is the function of root hair cells?

    • A.

      To absorb oxygen

    • B.

      To absorb water

    • C.

      To absorb carbon dioxide.

    • D.

      To absorb water and minerals/nutrients.

    • E.

      All of the above

    Correct Answer
    D. To absorb water and minerals/nutrients.
    Explanation
    Root hair cells are specialized cells found in the root system of plants. Their main function is to absorb water and minerals/nutrients from the soil. These cells have long, thin projections called root hairs that increase the surface area for absorption. They have a large number of transport proteins in their cell membranes that facilitate the uptake of water and nutrients. Therefore, the correct answer is "To absorb water and minerals/nutrients."

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  • 3. 

    If a microscope had an ocular lens of 10 times magnification and an objective lens of 20 times magnification, what would be the total magnification?

    • A.

      20 times magnification

    • B.

      50 times magnification

    • C.

      100 times magnification

    • D.

      200 times magnification

    Correct Answer
    D. 200 times magnification
    Explanation
    The total magnification of a microscope is calculated by multiplying the magnification of the ocular lens (eyepiece) by the magnification of the objective lens. In this case, if the ocular lens has a magnification of 10 times and the objective lens has a magnification of 20 times:

    Total Magnification = Ocular Lens Magnification × Objective Lens Magnification
                      = 10 × 20
                      = 200

    So, the total magnification of the microscope would be 200 times.

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  • 4. 

    DNA carries the instructions for an organism to grow. DNA stands for.....

    • A.

      Deoxyribose nucleic apple

    • B.

      Deoxyribose nucleic apparatus

    • C.

      Deoxyribonucleic acid

    • D.

      Deoxyribose nucleus acid

    Correct Answer
    C. Deoxyribonucleic acid
    Explanation
    DNA stands for Deoxyribonucleic acid. It is a molecule that carries the genetic instructions for the growth, development, functioning, and reproduction of all known organisms. It is composed of two long chains of nucleotides that are twisted into a double helix structure. The nucleotides in DNA contain a sugar called deoxyribose, hence the name Deoxyribonucleic acid. This molecule is essential for the storage and transmission of genetic information from one generation to the next.

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  • 5. 

    Plants contain vascular bundles, which are similar to human veins and arteries. These bundles have two types of vascular tissues, one that carries water and another that carries glucose solution. What are these two types of vascular tissues?

    • A.

      Cambium and glucose

    • B.

      Phloem and cambium

    • C.

      Xylem and cambium

    • D.

      Phloem and xylem

    Correct Answer
    D. Phloem and xylem
    Explanation
    Plants contain vascular bundles, which are similar to human veins and arteries. These vascular bundles contain two things: one is responsible for carrying water, and the other is responsible for carrying a glucose solution. The two things referred to in the question are phloem and xylem. Phloem is the tissue responsible for transporting the glucose solution, while xylem is responsible for transporting water.

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  • 6. 

    What are the four bases that make up the code for DNA?

    • A.

      T, A, G, and C

    • B.

      T, A, D, and F

    • C.

      T, E, C, and H

    • D.

      T, A, G, and E

    Correct Answer
    A. T, A, G, and C
    Explanation
    The four bases that make up the code for DNA are T, A, G, and C. These bases are the building blocks of DNA and are responsible for carrying the genetic information. T (thymine) pairs with A (adenine), and G (guanine) pairs with C (cytosine) to form the double helix structure of DNA. These base pairs determine the genetic code and are essential for DNA replication and protein synthesis.

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  • 7. 

    Where does photosynthesis take place in plants?

    • A.

      Nucleus

    • B.

      Vacuole

    • C.

      Chloroplasts

    • D.

      Mitochondria

    Correct Answer
    C. Chloroplasts
    Explanation
    Photosynthesis is the process by which plants convert sunlight into energy. It occurs in the chloroplasts, which contain chlorophyll, the pigment responsible for capturing sunlight. The chloroplasts are found in the cells of the plant's leaves, where they absorb light energy and use it to convert carbon dioxide and water into glucose and oxygen. The nucleus is responsible for controlling the cell's activities, the vacuole stores water and other substances, and the mitochondria produce energy through cellular respiration. Therefore, the correct answer is chloroplasts/chlorophyll.

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  • 8. 

    DNA code tells the cell how to make...

    • A.

      Glucose

    • B.

      Oxygen

    • C.

      Protein

    • D.

      Blood

    Correct Answer
    C. Protein
    Explanation
    The DNA code contains instructions that guide the cell in making proteins. Proteins are essential molecules that perform various functions in the body, such as building and repairing tissues, regulating chemical reactions, and supporting the immune system. DNA is transcribed into RNA, which is then translated into proteins through a process called protein synthesis. Therefore, the correct answer is protein.

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  • 9. 

    Animal cells have...

    • A.

      Chloroplast

    • B.

      Mitochondria

    • C.

      Cell wall

    • D.

      Nucleus

    • E.

      Cytoplasm

    Correct Answer(s)
    B. Mitochondria
    D. Nucleus
    E. Cytoplasm
    Explanation
    Animal cells have a nucleus, cytoplasm, and mitochondria. The nucleus is the control center of the cell, containing the genetic material and regulating cell activities. Cytoplasm is a gel-like substance that fills the cell, providing a medium for cellular processes. Mitochondria are the powerhouse of the cell, responsible for generating energy through cellular respiration. Chloroplasts are not present in animal cells, as they are responsible for photosynthesis in plant cells. Cell walls are also absent in animal cells, as they have a cell membrane.

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  • 10. 

    Animals without backbones are called vertebrates. 

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The statement is incorrect. Animals without backbones are called invertebrates, not vertebrates. Vertebrates are animals that have a backbone or spinal column.

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  • 11. 

    For seeds to germinate, they need... (Select all that apply)

    • A.

      Water

    • B.

      Warmth

    • C.

      Light

    • D.

      Oxygen

    Correct Answer(s)
    A. Water
    B. Warmth
    D. Oxygen
    Explanation
    Seeds need water, warmth, and oxygen to germinate. Water is essential for the activation of enzymes that initiate germination. Warmth provides the necessary temperature for the enzymatic reactions to occur. Oxygen is required for respiration, which provides energy for the germination process. Light, although important for the growth of the seedling after germination, is not necessary for the actual germination process itself.

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  • 12. 

    Biology is the study of:

    • A.

      Light

    • B.

      Life

    • C.

      Logic

    • D.

      All of the above

    Correct Answer
    B. Life
    Explanation
    Biology is the study of life, encompassing the examination of living organisms, their structure, function, growth, evolution, and distribution. It focuses on understanding the various processes and systems that occur within living organisms, including their interactions with the environment. Therefore, the correct answer is "life" because biology is specifically concerned with the study of living things.

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  • 13. 

    Which part of the cell is responsible for controlling cell activities and contains genetic material?

    • A.

      Cytoplasm

    • B.

      Cell Membrane

    • C.

      Nucleus

    • D.

      Endoplasmic Reticulum

    Correct Answer
    C. Nucleus
    Explanation
    The nucleus is the control center of a cell, housing the cell’s genetic material (DNA). It is surrounded by a double membrane called the nuclear envelope, which protects the DNA and regulates what enters and exits the nucleus. The nucleus orchestrates cell activities by directing protein synthesis and cell division. It contains the nucleolus, where ribosomal RNA is produced. Understanding the nucleus is essential for grasping how cells function, replicate, and respond to their environment. It plays a critical role in heredity and the regulation of cellular processes.

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  • 14. 

    Which type of biomolecule is primarily used for long-term energy storage in the body?

    • A.

      Carbohydrates

    • B.

      Proteins

    • C.

      Lipids

    • D.

      Nucleic Acids

    Correct Answer
    C. Lipids
    Explanation
    Lipids are biomolecules primarily used for long-term energy storage in the body. They are fats and oils, composed mainly of fatty acids and glycerol. Lipids store more energy per gram than carbohydrates or proteins, making them efficient for long-term energy reserves. They also play vital roles in forming cell membranes, providing insulation, and protecting organs. Understanding lipids is crucial in biology because they are essential for energy balance, cellular structure, and metabolic processes. Their unique properties make them a key component in the storage and utilization of energy within the body.

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Stephen Reinbold |PhD, Biological Sciences |
Biology Expert
Stephen Reinbold has a Ph.D. in Biological Sciences with a particular interest in teaching. He taught General Biology, Environmental Science, Zoology, Genetics, and Anatomy & Physiology for almost thirty years at Metropolitan Community College in Kansas City, Missouri. He particularly enjoyed emphasizing scientific methodology and student research projects. Now, enjoying retirement, he works part-time as an editor while also engaging in online activities.

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