Dna Quiz

Words: 343
Pages: 2

1. Each organism has a unique combination of characteristics encoded in molecules of
a. protein. c. carbohydrates.
b. enzymes. d. DNA.
ANS: D DIF: 1 OBJ: 10-4.1 2. The primary function of DNA is to
a. make proteins.
b. store and transmit genetic information.
c. control chemical processes within cells.
d. prevent mutations.
ANS: B DIF: 2 OBJ: 10-2.4 3. All of the following are true about the structure of DNA except
a. short strands of DNA are contained in chromosomes inside the nucleus of a cell.
b. every DNA nucleotide contains a sugar, a phosphate group, and a base.
c. DNA consists of two strands of nucleotides joined by hydrogen bonds.
d. the long strands of nucleotides are twisted into a double helix.
ANS: A DIF: 1 OBJ: 10-2.2 4. Molecules of DNA are composed of long chains of
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amino acids. c. monosaccharides.
b. fatty acids. d. nucleotides.
ANS: D DIF: 1 OBJ: 10-2.1 5. Which of the following is not part of a molecule of DNA?
a. deoxyribose c. phosphate
b. nitrogenous base d. ribose
ANS: D DIF: 1 OBJ: 10-2.2 6. A nucleotide consists of
a. a sugar, a protein, and adenine.
b. a sugar, an amino acid, and starch.
c. a sugar, a phosphate group, and a nitrogenous base.
d. a starch, a phosphate group, and a nitrogenous base.
ANS: C DIF: 1 OBJ: 10-2.2 7. The part of the molecule for which deoxyribonucleic acid is named is the
a. phosphate group.
b. sugar.
c. nitrogenous base.
d. None of the above; DNA is not named after part of the molecule.
ANS: B DIF: 1 OBJ: 10-2.2
2
8.
Refer to the illustration above. The entire molecule shown in the diagram is called a(n)
a. amino acid. c. polysaccharide.
b. nucleotide. d. pyrimidine.
ANS: B DIF: 1 OBJ: 10-2.2 9. Purines and pyrimidines