Question

during the replication of a dna molecule, the bonds between the nitrogen bases break, and the strands unzip. one unzipped segment with its exposed bases labelled looked like the following diagram. how many free - floating nucleotides with the nitrogen base thymine (t) will attach to the exposed bases of this segment? 6 8 4 3

Explanation:

Step1: Recall base - pairing rules

In DNA replication, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).

Step2: Count complementary bases

Examine the exposed bases in the DNA segment. Count the number of adenine (A) bases as they will pair with thymine (T). There are 3 adenine (A) bases in the exposed segment.

Answer:

3