AP BIOLOGY

Detailed explanation-1: -Primase synthesizes RNA primers complementary to the DNA strand. DNA polymerase III extends the primers, adding on to the 3’ end, to make the bulk of the new DNA. 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: -RNA primase attaches a short RNA molecule called a primer to the DNA sequence, which is removed upon the completion of DNA replication. Another enzyme involved in gene expression is called RNA polymerase, which uses template DNA strands to form RNA molecules.

Detailed explanation-3: -DNA primases are enzymes whose continual activity is required at the DNA replication fork. They catalyze the synthesis of short RNA molecules used as primers for DNA polymerases.

Detailed explanation-4: -A protein called RNA primase reads the existing DNA strand and adds a short sequence of RNA nucleotides. DNA polymerase then builds onto the 3’ end of the RNA primer.