Question

What enzyme joins individual nucleotides to produce the new strand of DNA

Answer 1

polymerase enzymes

Answer 2

Since the question says ''join'', I'd think the most likely answer is: ligase

Answer 3

To synthesize the two chains of deoxyribonucleotides during DNA replication, the DNA polymerase enzymes involved are only able to join the phosphate group at the 5' carbon of a new nucleotide to the hydroxyl (OH) group of the 3' carbon of a nucleotide already in the chain.

Answer 4

Yeah you're right. Coming to think about it, ligase doesn't necessarily do it for production of a new DNA strand as the question states.