Which of the Following Represents a Strand of DNA Complementary

Question

Which of the following represents a strand of DNA complementary to TTT CGC GGG TCG?
A) UUU GCG AAA UGC
B) UUU GCG CCC AGC
C) AAA GCG CCC AGC
D) AAA GCG CCC UGC

Accepted Answer

In DNA, adenine pairs with thymine (A-T) and cytosine pairs with guanine (C-G). Therefore, the complementary strand would have ACG GCC AAA GCA sequence. In RNA, adenine pairs with uracil (A-U) and cytosine still pairs with guanine (C-G). Thus, options A and B are incorrect because they have uracil instead of thymine. Option D also has a U instead of T but it also has U in place of G, making it incorrect. Only option C has the correct sequence of bases with the proper pairing.