McGraw-Hill Online Learning Center Test<BLURT>

McGraw-Hill Online Learning Center Test


1. Review the animation and answer the following questions.

The outer structure of the DNA double helix is composed of

A. one strand with only sugar groups and one strand with only phosphate groups.
B. paired nitrogenous bases.
C. unpaired nitrogenous bases.
D. alternating sugar-phosphate groups.


2. Base pairing occurs due to A. hydrogen bonding.
B. specificity between substrate and active site.
C. covalent bonding between sugar and phosphate groups.
D. covalent bonding between complementary nitrogenous bases.


3. Cytosine will always pair with A. adenine.
B. guanine.
C. thymine.
D. cytosine.
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