Based on This Figure, the Rules for Nucleotide Base Pairing

question 52

Multiple Choice

Based on this figure, the rules for nucleotide base pairing in DNA must be:

• A)adenine with cytosine, and guanine with thymine.
• B)adenine with thymine, and guanine with phosphate.
• C)adenine with guanine, and cytosine with thymine.
• D)adenine with thymine, and guanine with cytosine.

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Definitions:

Valves

Structures present in the heart and veins that maintain unidirectional flow of blood by opening and closing in response to pressure differences.

Venous Valves

Structures within veins that prevent the backward flow of blood, crucial for blood returning to the heart.

Tunica Media

The middle layer of the wall of a blood vessel consisting mainly of smooth muscle cells and elastic fibers, responsible for regulating the diameter of the vessel.

Lumen

The inside space of a tubular structure, such as a blood vessel or intestine.