Question

1. what are the

ungs\ of the dna ladder made of?
a. ______
b. ______
c. ______
d. ______

Explanation:

The "rungs" of the DNA ladder (double helix) are made of pairs of nitrogenous bases. The four types of nitrogenous bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G). These bases pair up: A with T, and C with G, held together by hydrogen bonds. So the rungs consist of base pairs (A - T, T - A, C - G, G - C).

Answer:

The "rungs" of the DNA ladder are made of pairs of nitrogenous bases (adenine - thymine, thymine - adenine, cytosine - guanine, guanine - cytosine). The four nitrogenous bases involved are:
a. Thymine (T)
b. Cytosine (C)
c. Guanine (G)
d. Adenine (A)

(Note: The rungs are formed by the pairing of these bases, e.g., A pairs with T, C pairs with G, so the rungs consist of these base - pair combinations.)