Question

during replication, one double - stranded dna molecule is used to make two double - stranded dna molecules. what determines the ability of one strand of dna to serve as a template?
a. the sequence of bases in the middle of the double helix.
b. the type of the bases to bond randomly.
c. consistency in how bases are paired.
d. (the option content is not fully visible from the image)

Explanation:

The question is about DNA replication and base pairing. DNA replication relies on the specific base - pairing rules (A - T, G - C in DNA). The consistency in how bases are paired (the last option) determines the ability of one strand to serve as a template because the complementary base - pairing is consistent. Bases don't bond randomly (so the option about random bonding is wrong), the number of bases in the middle or the bonds between bases of one strand don't determine the templating ability as much as the consistent base - pairing rules.

Answer:

Consistency in how bases are paired.