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Science Quiz – Test 13

Science quiz, test 13 of 15: 10 multiple-choice questions with answers. Try them, then play the interactive quiz on Zeno to earn XP.

  1. Question 121

    What is the basic building block of proteins?

    • A Carbohydrate
    • B Amino acid
    • C Nucleotide
    • D Fatty acid
    Show answer

    Correct answer: Amino acid

  2. Question 122

    What is the primary pigment involved in photosynthesis in plants?

    • A Chlorophyll
    • B Xanthophyll
    • C Anthocyanin
    • D Carotene
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    Correct answer: Chlorophyll

  3. Question 123

    What is the primary process by which plants convert nitrogen from the atmosphere into a usable form for growth?

    • A Nitrogen fixation
    • B Denitrification
    • C Nitrification
    • D Ammonification
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    Correct answer: Nitrogen fixation

  4. Question 124

    What is the primary element found in organic compounds?

    • A Hydrogen
    • B Carbon
    • C Nitrogen
    • D Oxygen
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    Correct answer: Carbon

  5. Question 125

    What is the chemical process by which certain bacteria convert sulfate to sulfide in anaerobic conditions?

    • A Ammonia assimilation
    • B Nitrate reduction
    • C Sulfate reduction
    • D Sulfite oxidation
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    Correct answer: Sulfate reduction

  6. Question 126

    What is the primary gas used by plants during photosynthesis to produce glucose?

    • A Hydrogen
    • B Carbon dioxide
    • C Nitrogen
    • D Oxygen
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    Correct answer: Carbon dioxide

  7. Question 127

    What is the primary component of Earth's atmosphere that is essential for respiration in animals?

    • A Carbon Dioxide
    • B Oxygen
    • C Hydrogen
    • D Nitrogen
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    Correct answer: Oxygen

  8. Question 128

    What is the primary molecule that carries genetic information in living organisms?

    • A Protein
    • B DNA
    • C RNA
    • D Carbohydrate
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    Correct answer: DNA

  9. Question 129

    What is the primary mechanism by which neurons communicate with each other?

    • A Axonal conduction
    • B Neuroplasticity
    • C Synaptic transmission
    • D Dendritic integration
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    Correct answer: Synaptic transmission

  10. Question 130

    What is the process by which bacteria convert organic materials into energy in the absence of oxygen?

    • A Respiration
    • B Decomposition
    • C Photosynthesis
    • D Fermentation
    Show answer

    Correct answer: Fermentation

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