Question

What are the four nitrogenous bases that make up the "rungs" of a DNA molecule, connecting the two strands?

(A) Adenine, inosine, uracil, and guanine
(B) Adenine, thymine, inosine, and guanine
(C) Adenine, thymine, cytosine, and uracil
(D) Adenine, thymine, cytosine, and guanine

Answer 1

Adenine, thymine, cytosine, and guanine are the four nitrogenous bases that make up the "rungs" of a DNA molecule.

Step-by-step explanation:

The four nitrogenous bases that make up the "rungs" of a DNA molecule, connecting the two strands, are adenine (A), thymine (T), cytosine (C), and guanine (G).