IGCSE Biology Quiz Questions And Answers

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IGCSE Biology Quiz Questions And Answers - Quiz


How much do you know about biology? Take this IGCSE biology quiz with well-researched questions and answers to check your knowledge. Biology has made a lot of progress. The goal of biology is to improve our lives through controlled inheritance, genetic engineering, the study of vitamins, hormones, cancer research, and the environment. Many studies have been performed to determine air pollution's consequences on man, plants, and animals. This ultimate quiz on biology will indeed prepare you for an exam if needed. All the best for a perfect score!


Questions and Answers
  • 1. 

    In which of these glands is ADH (Anti-Diuretic Hormone) produced?

    • A.

      Adrenal Glands (found on kidneys)

    • B.

      Pituitary Glands (found in the brain)

    • C.

      Endocrine Glands (found above pancreas)

    • D.

      Salivary Glands (found in the throat)

    Correct Answer
    B. Pituitary Glands (found in the brain)
    Explanation
    ADH, or Anti-Diuretic Hormone, is produced in the Pituitary Glands, which are located in the brain. The Pituitary Glands are responsible for producing and releasing various hormones, including ADH, which helps in regulating the body's water balance by controlling the amount of water reabsorbed by the kidneys.

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  • 2. 

    Greenhouse gases absorb and re-emit long-wave radiation to warm the earth's surface and lower atmosphere?

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Greenhouse gases, such as carbon dioxide and methane, have the ability to absorb and re-emit long-wave radiation. This process is known as the greenhouse effect. When sunlight reaches the Earth's surface, it is absorbed and re-emitted as heat energy. Greenhouse gases trap some of this heat energy in the atmosphere, preventing it from escaping into space. This leads to a warming effect on the Earth's surface and lower atmosphere, which is why the statement is true.

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  • 3. 

    Which of the following group of organisms are decomposers? 

    • A.

      Animals

    • B.

      Plants

    • C.

      Fungi

    • D.

      Bacteria

    Correct Answer(s)
    C. Fungi
    D. Bacteria
    Explanation
    In truth - Fungi feed on dead matter by saprotrophic nutrition. Some protoctists are decomposers, whereas some are autotrophic (they can photosynthesize to obtain energy)

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  • 4. 

    What is the name of the enzyme involved in the following equation? Lipids - > Fatty Acids + Glycerol

    • A.

      Ligase

    • B.

      Lipase

    • C.

      Restriction Endonuclease

    • D.

      Lactase

    Correct Answer
    B. Lipase
    Explanation
    Lipase is the correct answer because lipase is the enzyme involved in the hydrolysis of lipids into fatty acids and glycerol. Lipase catalyzes the breakdown of lipids by breaking the ester bonds between the fatty acids and glycerol molecules. This process is important for the digestion and absorption of dietary fats in the body.

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  • 5. 

    What is the name given to the part of the kidney that stores urine?

    • A.

      Medulla

    • B.

      Nephron

    • C.

      Loop of Henle

    • D.

      Pelvis

    Correct Answer
    D. Pelvis
    Explanation
    The correct answer is Pelvis. The pelvis is the part of the kidney that stores urine. It is a funnel-shaped structure that collects urine from the nephrons and transports it to the ureter for elimination from the body. The medulla, nephron, and loop of Henle are all parts of the kidney, but they do not specifically store urine.

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  • 6. 

    Study the simplified chemical reaction(s) below involved in the ecological nitrogen cycle. Ammonia -> Nitrites -> Nitrates -> Nitrogen What TWO types of reactions are taking place?

    • A.

      Oxidation

    • B.

      Neutralization

    • C.

      Nitrification

    • D.

      Ionification

    Correct Answer(s)
    A. Oxidation
    C. Nitrification
    Explanation
    The correct answer is oxidation and nitrification. Oxidation refers to the process of gaining oxygen or losing hydrogen, and in this case, ammonia is being oxidized to nitrites and then to nitrates. Nitrification is the process of converting ammonia to nitrites and then to nitrates, which is exactly what is happening in the given chemical reactions.

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  • 7. 

    Which of the following blood vessels carries the least amount of oxygen?

    • A.

      Vena Cava

    • B.

      Aorta

    • C.

      Capillary

    • D.

      Femoral Artery

    Correct Answer
    A. Vena Cava
    Explanation
    The vena cava carries deoxygenated blood from the body back to the heart. It is the largest vein in the body and has the least amount of oxygen compared to the other options listed. The aorta is the main artery that carries oxygenated blood from the heart to the rest of the body. Capillaries are tiny blood vessels where the exchange of oxygen and nutrients occurs. The femoral artery is an artery that supplies oxygenated blood to the thigh and lower leg.

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  • 8. 

    Bacteria do not have cell walls.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    They do!

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  • Sep 20, 2023
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    Bio101
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