McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

What are the "uprights" of the DNA double helix composed of?

A. nucleotides
B. deoxyribose sugar and phosphate groups
C. saturated fatty acids
D. nitrogenous bases


2. What is the pattern of base pairing that occurs within the double helix of the DNA molecule?

A. cytosine pairs with guanine; thymine pairs with adenine
B. cytosine pairs with adenine; thymine pairs with guanine
C. cytosine and guanine can pair with either thymine or adenine
D. There is no pattern to the base pairing found in the DNA molecule.
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