Question

During DNA replication, what would be the complementary strand to the original DNA segment of GCTAAT? A) CGATTA B) GGATTA C) GGAUUA D) GGUTTU

Answer 1

A) CGATTA

Guanine pairs with Cytosine (and vice versa)

Thymine pairs with Adenine (and vice versa)

Answer 2

The correct answer would be A) CGATTA

During DNA replication, the daughter strand is synthesized on the basis of complementary base pairs i.e. purines will always base-pair with pyrimidine.

The two strands are joined together with the help of hydrogen bonding between the nitrogen bases of the nucleotides.

The adenine will always base pair with thymine with the help of 2 hydrogen bonds and guanine will always base pair with cytosine with the help of 3 hydrogen bonds.