Question

question 21
what is the role of dna polymerase?
o make proteins from a dna sequence
o fix errors caused by chemical mutagens
o split the dna strands
o copy a single strand of dna

Explanation:

DNA polymerase is an enzyme that is crucial in DNA replication. It adds nucleotides to the growing DNA strand, following the base - pairing rules (A with T, C with G). It also has a proof - reading function. When there are errors in the newly synthesized DNA strand (such as those caused by chemical mutagens), DNA polymerase can correct these errors.
Making proteins from a DNA sequence is mainly the function of processes like transcription (to mRNA) and translation (by ribosomes). Splitting the DNA strands is mainly done by helicase. Copying a single strand of DNA is part of the overall replication process, but the more specific and important role related to error - correction among the given options is fixing errors caused by chemical mutagens.

Answer:

fix errors caused by chemical mutagens