AP BIOLOGY

Detailed explanation-1: -RNA primers are removed and replaced with DNA by DNA polymerase I. The gaps between DNA fragments are sealed by DNA ligase.

Detailed explanation-2: -Reverse transcriptase (RT), also known as RNA-dependent DNA polymerase, is a DNA polymerase enzyme that transcribes single-stranded RNA into DNA. This enzyme is able to synthesize a double helix DNA once the RNA has been reverse transcribed in a first step into a single-strand DNA.

Detailed explanation-3: -DNA polymerase I: An enzyme that removes the RNA primers and replaces them with newly synthesized DNA. Lagging strand: One of the two newly synthesized DNA strands that must be synthesized in the opposite direction from the replication fork.

Detailed explanation-4: -In living organisms, primers are short strands of RNA. A primer must be synthesized by an enzyme called primase, which is a type of RNA polymerase, before DNA replication can occur.