In a chemical analysis of DNA, which would always be true?

a. The amount of adenine equals the amount of Thymine.

b. The amount of thymine equals the amount of cytosine.

c. The amount of ribose equals the amount of deoxyribose.

Answer:c

A

Explanation:

in DNA there is complementary base pairing which is that Adenine always pairs with Thymine and Cytosine always pairs with Guanine. therefore, if there is a certain amount of adenine in the DNA it must have the same amount of its complementary base, thymine.

the answer cannot be b as cytosine and thymine are not complementary base pairs. although b can coincidently be correct - that the amount of cytosine and thymine are equal - the question states that it must always be true. the answer cannot be c as ribose is found in RNA and deoxribose is found in DNA.