Question

a dna molecule consists of two polynucleotide strands that form a double helix. the strands are held together by hydrogen bonds between the nitrogen - containing bases. one strand is complementary to the other strand, which means that a base on one strand is paired with a base on the opposite strand. the nucleotide bases in dna are adenine (a), cytosine (c), guanine (g), and thymine (t). choose the dna sequence complementary to gact. aagtc octga otcag ogact

Explanation:

In DNA, adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G). For the sequence GACT, G pairs with C, A with T, C with G, and T with A, resulting in CTGA.

Answer:

B. CTGA