Chapter 2 Section 3 Review Questions

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  • 1/8 Questions

    Proteins are large, organic molecules formed by joining together

    • Fats
    • Carbohydrates
    • Amino acids
    • Simple sugars
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About This Quiz

Use this quiz as a review for exam 3. Exam 3 includes material from ALL of chapter 2 (sections 1 through 4).

Chapter Reviews Quizzes & Trivia

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  • 2. 

    A protein that acts as a biological catalyst is a(n)

    • Enzyme

    • Fat

    • Hormone

    • Simple sugar

    Correct Answer
    A. Enzyme
    Explanation
    Enzymes are proteins that act as biological catalysts, meaning they speed up chemical reactions in living organisms. They do this by lowering the activation energy required for a reaction to occur, allowing it to happen more quickly. Enzymes are highly specific, meaning they only catalyze specific reactions. They are not fats, hormones, or simple sugars, which have different functions in the body. Therefore, the correct answer is enzyme.

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  • 3. 

    Which formula on page 57 of the text represents an amino acid?

    • Formula A

    • Formula B

    • Formula C

    • Formula D

    Correct Answer
    A. Formula C
  • 4. 

    Which is NOT an organic molecule found in living organisms?

    • Protein

    • Sugar

    • Water

    • Carbohydrate

    Correct Answer
    A. Water
    Explanation
    Water is not considered an organic molecule because it does not contain carbon. Organic molecules are defined as compounds that contain carbon and hydrogen atoms bonded together in a specific way. Water, on the other hand, consists of hydrogen and oxygen atoms, making it an inorganic molecule. Despite being essential for life, water is not classified as an organic molecule.

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  • 5. 

    Examples of large complex molecules formed by joining together many small molecules include

    • Proteins and amino acids

    • Carbohydrates and monosaccharides

    • DNA and proteins

    • Mitochondria and vacuoles

    Correct Answer
    A. DNA and proteins
    Explanation
    DNA and proteins are examples of large complex molecules formed by joining together many small molecules. DNA is composed of nucleotides, which are small molecules consisting of a sugar, a phosphate group, and a nitrogenous base. These nucleotides are joined together through phosphodiester bonds to form a long strand of DNA. Proteins, on the other hand, are composed of amino acids, which are small molecules consisting of an amino group, a carboxyl group, and a side chain. Amino acids are joined together through peptide bonds to form a polypeptide chain, which then folds into a functional protein.

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  • 6. 

    Which type of molecule is represented by formula D on page 57 in the text?

    • Amino acid

    • Monosaccharide

    • Disaccharide

    • Protein

    Correct Answer
    A. Disaccharide
    Explanation
    The correct answer is disaccharide. This means that the molecule represented by formula D on page 57 in the text is a disaccharide.

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  • 7. 

    Which class period are you in?

    • 1

    • 4

    • 7

    • 8

  • 8. 

    In living organisms, the millions of organic compounds are classified into groups.  For example, lipids are a large and varied group of organic compounds that include fats, oils, and waxes.  Name three other groups of organic compounds.  Describe the compounds and their monomers, and explain why each group of compounds is important.  Give examples of each

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  • Mar 20, 2023
    Quiz Edited by
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  • Oct 02, 2011
    Quiz Created by
    Biancabrandon
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