Q. If one strand of DNA has the sequence ATCGTATG, the sequence in the complementary strand would be
A) TAGCTTAC
B) TCACATAC
C) TAGCATAC
D) TACGATAC
Explanation
(c)
Because of size and geometries of the bases, the only possible pairings in DNA are between G (guanine) and C (cytosine) through three H-bonds and between A (adenine) and T (thymine) through two H-bonds. Hence,
A T C G T A T G
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T A G C A T A C
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.