Answer:
A. A-T
Explanation:
The nitrogenous bonds in DNA bond like so:
Adenine with Thymine, or A with T
Cytosine with Guanine, or C with G
A: A-T
This bond is correct. Adenine is with thymine.
B: G-T
This is incorrect. Guanine (G) should bond with cytosine (C), and thymine (T) with adenine (A).
C: C-A
This is also incorrect. Cytosine (C) should bond with guanine(G), and adenine(A) with thymine (T).
D: C-T
This is incorrect as well. Cytosine (C) should bond with guanine(G), and thymine(T) with adenine(A).
The correct bond is A: A-T, adenine with thymine.
