AP BIOLOGY

Detailed explanation-1: -One of the key molecules in DNA replication is the enzyme DNA polymerase. DNA polymerases are responsible for synthesizing DNA: they add nucleotides one by one to the growing DNA chain, incorporating only those that are complementary to the template.

Detailed explanation-2: -The correct answer is DNA polymerase. DNA polymerase is an enzyme responsible for making copies of DNA within the nucleus of the cell. The major function of this enzyme is to add appropriate nucleotides to make the new copy of DNA. It can add nucleotides on the 3’ end of the strand which is produced during replication.

Detailed explanation-3: -The enzyme that synthesizes DNA, DNA polymerase, can only add nucleotides to an already existing strand or primer of DNA or RNA that is base paired with the template. An enzyme, DNA polymerase, is required for the covalent joining of the incoming nucleotide to the primer.

Detailed explanation-4: -DNA polymerase is responsible for the process of DNA replication, during which a double-stranded DNA molecule is copied into two identical DNA molecules. Scientists have taken advantage of the power of DNA polymerase molecules to copy DNA molecules in test tubes via polymerase chain reaction, also known as PCR.