Biochemistry Exam

20 Questions

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Biochemistry Exam Quizzes & Trivia

Biochemistry exam for students


Questions and Answers
  • 1. 
    1. If you remove all of the functional groups from an organic molecule so that it has only carbon and hydrogen atoms, the molecule becomes a _____ molecule.
    • A. 

      Carbohydrate

    • B. 

      Carbonyl

    • C. 

      Carboxyl

    • D. 

      Hydrocarbon

  • 2. 
    • A. 

      Is a shape change

    • B. 

      Is always irreversible

    • C. 

      May be caused by a pH change

    • D. 

      Could result from a temperature change

  • 3. 
    There are several levels of protein structure, the most complex of which is
    • A. 

      Primary

    • B. 

      Secondary

    • C. 

      Tertiary

    • D. 

      Quaternary

  • 4. 
    • A. 

      Amino

    • B. 

      Phosphodiester

    • C. 

      Carboxyl

    • D. 

      Phosphate

  • 5. 
    With respect to galactose, glucose is
    • A. 

      A stereoisomer

    • B. 

      A structural isomer

    • C. 

      Not an isomer

    • D. 

      Unrelated except that they are both sugars

  • 6. 
    The functional group - NH2 is a(n)
    • A. 

      Carboxyl group

    • B. 

      Amino group

    • C. 

      Hydroxyl group

    • D. 

      Phosphate group

    • E. 

      Carbonyl group

  • 7. 
    Glucose is a
    • A. 

      Protein

    • B. 

      Disaccharide

    • C. 

      Nucleic acid

    • D. 

      Monosaccharide

    • E. 

      Starch

  • 8. 
    Double helix describes the structure of a molecule of      
    • A. 

      Protein

    • B. 

      Disaccharide

    • C. 

      Starch

    • D. 

      Monosaccharide

    • E. 

      DNA

  • 9. 
    Triacylglycerol contains fatty acids and
    • A. 

      Glucose

    • B. 

      Glycogen

    • C. 

      Glycerol

    • D. 

      Guanine

    • E. 

      An amino

  • 10. 
    In the formation of a macromolecule, what type of bond would join two amino acid subunits?
    • A. 

      Ionic bond

    • B. 

      Phosphodiester bond

    • C. 

      Hydrogen bond

    • D. 

      Peptide bond

  • 11. 
    The sequence of amino acids in a polypeptide is called the
    • A. 

      Primary structure

    • B. 

      Secondary structure

    • C. 

      Tertiary structure

    • D. 

      Quaternary structure

  • 12. 
    • A. 

      Sucrose

    • B. 

      Maltose

    • C. 

      Lactose

    • D. 

      Amylose

    • E. 

      All of the above are disaccarides

  • 13. 
    The general term for a large molecule made up of many similar subunits is
    • A. 

      Polymer

    • B. 

      Functional group

    • C. 

      Peptide

    • D. 

      Helix

  • 14. 
    Dehydration and hydrolysis reactions involve removing or adding _______________ to macromolecule subunits.
    • A. 

      C and O

    • B. 

      CH and NH2

    • C. 

      COOH and H

    • D. 

      OH and H

  • 15. 
    Which of the following nitrogenous bases is found in DNA but is not found in RNA? adenine guanine cytosine thymine uracil
    • A. 

      Adenine

    • B. 

      Guanine

    • C. 

      Cytosine

    • D. 

      uracil

    • E. 

      Thymine

  • 16. 
    What type of macromolecule carries out catalysis in biological systems?
    • A. 

      Proteins called enzymes

    • B. 

      Carbohydrates called starches

    • C. 

      Lipids called steroids

    • D. 

      Nucleic acids called DNA

    • E. 

      Carbohydrates called sugars

  • 17. 
    • A. 

      Uracil and thymine

    • B. 

      Cytosine and guanine

    • C. 

      Thymine and cytosine

    • D. 

      Adenine and guanine

    • E. 

      Guanine and thymine

  • 18. 
    • A. 

      One end of the molecule is hydrophilic while the other end is hydrophobic.

    • B. 

      It has one or more double bonds between carbon atoms.

    • C. 

      It contains more than one functional group.

    • D. 

      It has no double bonds or triple bonds between carbons

    • E. 

      Its functional groups include at least one aromatic ring.

  • 19. 
    Which element occurs in nucleic acids?
    • A. 

      Calcium

    • B. 

      Phosphorus

    • C. 

      Manganese

    • D. 

      Sulfur

    • E. 

      Iron

  • 20. 
    The two strands of a DNA double helix are held together by: ionic bonds.   hydrogen bonds.   nonpolar covalent bonds. polar covalent bonds. hydrophobic exclusions.
    • A. 

      Ionic bonds.

    • B. 

      Hydrogen bonds.

    • C. 

      Nonpolar covalent bonds.

    • D. 

      Polar covalent bonds.

    • E. 

      Hydrophobic exclusions.