Chargaff's rule states that the amounts of guanine and cytosine are roughly the same, and the amounts of adenine and thymine are roughly the same

A. in eukaryotes only. The rule doesn't apply to prokaryotes.

B. but the relative amounts of G+C and A+T vary by species.

C. except in species that use uracil in place of thymine in their DNA.

D. and the relative amounts of G+C and A+T don't vary by species.

Question

Biology

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19 April, 14:26

Chargaff's rule states that the amounts of guanine and cytosine are roughly the same, and the amounts of adenine and thymine are roughly the same

A. in eukaryotes only. The rule doesn't apply to prokaryotes.

B. but the relative amounts of G+C and A+T vary by species.

C. except in species that use uracil in place of thymine in their DNA.

D. and the relative amounts of G+C and A+T don't vary by species.

+1

Answers (2)

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Tanya Miles · Answer 1

B.

Explanation:

This is because of the base pairing rule in DNA. Guanine (G) pairs with Cytosine (C) while Adenine (A) pairs with Thiamine (T). Therefore, the amount of G will relatively be generally equal l to that of C while that of A will be generally equal to that of T.

Gillian Rocha · Answer 2

B

Explanation:

This is because of the base pairing rule in DNA. Guanine (G) pairs with Cytosine (C) while Adenine (A) pairs with Thiamine (T). Therefore, the amount of G will relatively be generally equal l to that of C while that of A will be generally equal to that of T. The amount of the complimentary base pairs will, therefore, be equal.