Science Quiz – Test 5

Science quiz, test 5 of 15: 10 multiple-choice questions with answers. Try them, then play the interactive quiz on Zeno to earn XP.

  1. Question 41

    What is the primary mechanism by which amino acids are linked together to form proteins?

    • A Peptide bonds
    • B Hydrogen bonds
    • C Ionic bonds
    • D Disulfide bonds
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    Correct answer: Peptide bonds

  2. Question 42

    What is the primary structural component of the bacterial cell wall?

    • A Lipopolysaccharide
    • B Peptidoglycan
    • C Chitin
    • D Cellulose
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    Correct answer: Peptidoglycan

  3. Question 43

    What is the most abundant greenhouse gas in the Earth's atmosphere?

    • A Nitrous oxide
    • B Water vapor
    • C Methane
    • D Carbon dioxide
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    Correct answer: Water vapor

  4. Question 44

    What is the primary gas produced as a byproduct of cellular respiration in animals?

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

  5. Question 45

    What is the primary component of the Earth's atmosphere that supports combustion?

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

  6. Question 46

    What is the name of the process by which living organisms convert glucose into energy without the use of oxygen?

    • A Fermentation
    • B Anaerobic respiration
    • C Photosynthesis
    • D Aerobic respiration
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    Correct answer: Anaerobic respiration

  7. Question 47

    What is the process by which plants release water vapor into the atmosphere through small openings in their leaves?

    • A Evaporation
    • B Photosynthesis
    • C Respiration
    • D Transpiration
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    Correct answer: Transpiration

  8. Question 48

    What is the pH range of neutral water at 25 degrees Celsius?

    • A 6.5
    • B 7.5
    • C 7
    • D 8
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    Correct answer: 7

  9. Question 49

    What gas do plants primarily absorb from the atmosphere during photosynthesis?

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

  10. Question 50

    What is the primary pigment responsible for the green color of plants?

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

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