Question

match the nitrogen base with its complement in dna. not all of them will be used.
adenine (a)
cytosine (c)
guanine (g)
thymine (t)
cytosine (c) thymine (t) uracil (u) guanine (g) adenine (a)

Explanation:

In DNA, base - pairing occurs according to specific rules. Adenine (A) always pairs with Thymine (T) through two hydrogen bonds. Cytosine (C) always pairs with Guanine (G) through three hydrogen bonds. Uracil (U) is found in RNA, not DNA.

Answer:

Adenine (A) - Thymine (T)
Cytosine (C) - Guanine (G)
Guanine (G) - Cytosine (C)
Thymine (T) - Adenine (A)