Question

dna is composed of two complementary strands. this is reflected in the fact that the number of adenines (a) in one is always equal to the number of thymines (t) in the other strand the number of cytosines (c) in one strand is always double the number of guanines (g) in the other strand. the number of guanines (g) in one strand is always equal to the number of adenines (a) in the other strand. the number of thymines (t) in one strand is always double the number of cytosines (c) in the other strand.

Explanation:

In DNA, A pairs with T and C pairs with G. So A - T and C - G base - pairing results in the number of A in one strand equaling the number of T in the complementary strand.

Answer:

A. the number of adenines (A) in one is always equal to the number of thymines (T) in the other strand