​If a DNA Sequence Contains 30 Percent Adenine Bases, Then

question 70

Multiple Choice

​If a DNA sequence contains 30 percent adenine bases, then it also contains ____.

• A)​40 percent guanine
• B)​35 percent cytosine
• C)​20 percent guanine
• D)​35 percent thymine
• E)​60 percent guanine plus cytosine

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Definitions:

Quartz

A hard, crystalline mineral composed of silicon and oxygen atoms, widely used in jewelry and electronics.

Halite

Also known as rock salt, a mineral form of sodium chloride (NaCl) that often occurs in evaporite deposits.

Crystal

A solid material whose atoms are arranged in highly ordered, repeating patterns extending in all three spatial dimensions.

Cleavage

The tendency of a mineral to break along flat planar surfaces as determined by the mineral’s crystal structure, often enhancing its gem quality.