Chemistry Of Life Quiz 2

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The Chemistry Of Life Quizzes & Trivia

This quiz will help you review concepts and vocabulary needed for success in unit 2 of the MCPS biology course.


Questions and Answers
  • 1. 

    Which of the following is NOT an organic compound?

    • A.

      Protein

    • B.

      Water

    • C.

      Carbohydrate

    • D.

      Lipid

    Correct Answer
    B. Water
    Explanation
    All of the organic compounds (lipds, carbs, proteins, and nucleic acids) all contain carbon. Water does not.

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  • 2. 

    The monomer for any carbohydrate is ________.

    • A.

      A monosaccharide

    • B.

      Sucrose

    • C.

      Starch

    • D.

      Cellulose

    Correct Answer
    A. A monosaccharide
    Explanation
    All carbohydrates can be made from the basic monomer for a carbohydrate--a monosaccharide (like glucose) with the formula C(6) H (12) O(6)

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  • 3. 

    A disaccharide, such as sucrose, is composed of ________ monosaccharide molecules.

    • A.

      One

    • B.

      Two

    • C.

      Three or more

    • D.

      Any number

    Correct Answer
    B. Two
    Explanation
    Remember, the prefix di- means "two."

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  • 4. 

    What is the smallest unit of water that still keeps its basic properties?

    • A.

      A lot

    • B.

      A drop

    • C.

      A molecule

    • D.

      An atom

    Correct Answer
    C. A molecule
    Explanation
    A single molecule of water will display polarity. There is no such thing as an atom of water, since it is composed of both hydrogen and oxygen atoms.

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  • 5. 

    What is a subatomic particle with a negative electrical charge?

    • A.

      Neutron

    • B.

      Nucleus

    • C.

      Proton

    • D.

      Electron

    Correct Answer
    D. Electron
    Explanation
    The electron has an negative charge.

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  • 6. 

    Molecules that have opposite charged regions, such as a water molecule, are said to be _______.

    • A.

      Mixture

    • B.

      Polar

    • C.

      Tropical

    • D.

      Solution

    Correct Answer
    B. Polar
    Explanation
    This is the basic definition of "polarity."

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  • 7. 

    Which of these is NOT part of a carbohydrate?

    • A.

      Hydrogen

    • B.

      Carbon

    • C.

      Magnesium

    • D.

      Oxygen

    Correct Answer
    C. Magnesium
    Explanation
    All carbohydrates contain carbon, hydrogen, and oxygen

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  • 8. 

    The total number of atoms in the molecule glucose, C6H12O6 is __________.  

    • A.

      1

    • B.

      3

    • C.

      12

    • D.

      24

    Correct Answer
    D. 24
    Explanation
    To determine the total number of atoms in a molecule, you must add the subscripts.

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  • 9. 

    Cells use __________ for energy.

    • A.

      Carbohydrates

    • B.

      Water

    • C.

      Monomers

    • D.

      Polymers

    Correct Answer
    A. Carbohydrates
    Explanation
    Carbohydrates supply energy. Water is important, but it doesn't provide energy. Although SOME monomers, like monosaccharides, and some polymers, such as starches, supply energy, not ALL do. These terms are too general.

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  • 10. 

    Carbohydrates are best obtained from food sources such as _________.

    • A.

      Butter, peanut butter, and olive oil

    • B.

      Bread, pasta, oranges

    • C.

      Cheese, margarine, and nuts

    • D.

      Fish, beef, and chicken

    Correct Answer
    B. Bread, pasta, oranges
    Explanation
    Recall the picture of carbohydrates from the flashcards that you studied.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 20, 2009
    Quiz Created by
    Kath0915
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