Which of the following is the correct complementary RNA strand to the DNA strand TAC-GCT-AAG?

A. ATG-CGA-TTC

B. UTG-CGU-TTC

C. CUG-CUA-CCG

D. AUG-CGA-UUC

The correct answer is option B

The main difference between the complementary sequence of DNA and RNA is the base. Adenine pairs with uracil in case of RNA.

The rest of the complementary base pairs are same but uracil binds with adenine by two hydrogen bonds. In case of DNA, uracil is replaced by thiamine.

The complementary sequence would be UTG-CGU-TTC

The correct complementary RNA strand would be answer B!