Question

The following sequence of letters represents the order of bases in a single strand of DNA. C-T-T-A-G-G-C-T-T-A-C-C-A Which of these sequences would be the complementary strand that forms during replication?

a)G-A-A-T-C-C-G-A-A-T-G-G-T G.
b)C-T-T-A-G-G-C-T-T-A-C-C-A
c)T-C-C-G-A-A-T-C-C-G-T-T-G
d)A-G-G-C-T-T-A-G-G-C-A-A-C

Answer 1

A) G-A-A-T-C-G-A-A-T-G-G-T-G

Step-by-step explanation:

The nitrogenous bases for DNA is A-T which is Adenine to Thymine and C-G which is Cytosine to Guanine. When A is present you switch with a T, when T is present switch with an A, and when C is present switch with a G and so on so forth.

Answer 2

The complementary strand of the given DNA sequence C-T-T-A-G-G-C-T-T-A-C-C-A is G-A-A-T-C-C-G-A-A-T-G-G-T.

Step-by-step explanation:

The DNA strand C-T-T-A-G-G-C-T-T-A-C-C-A is composed of the bases cytosine (C), thymine (T), adenine (A), and guanine (G). In DNA replication, the complementary strand is formed by pairing each base with its complementary base. The complementary base pairs are A with T and C with G. Therefore, the complementary strand of the given sequence is G-A-A-T-C-C-G-A-A-T-G-G-T.