Replication Flashcards
Type of bonds polymerases synthesize
Phosphodiester bonds
Enzyme that removes mismatched deoxynucleotides
3’-5’ exonuclease
During replication, a new nucleotide is added to which group of the previous nucleotide?
3’ hydroxyl group
Is a primer needed for DNA replication?
Yes
Is a primer needed for RNA replication?
No
Enzyme that synthesizes RNA primer
Primase
Polymerase that begins DNA synthesis in the 5’-3’ direction
DNA Polymerase III
Removes RNA primers
RNAase H
Role of DNA polymerase I in prokaryotes
Removes primer and synthesizes new DNA
Role of DNA ligase
Seals nicks between Okazaki fragments
Role of helicase
Unwinds DNA
Another name for DNA gyrase and it’s role
DNA topoisomerase II. It inserts negative supercoils to prevent DNA from being overwound
Types of eukaryotic DNA polymerases
DNA polymerase alpha, beta, gamma, delta, epsilon
Role of DNA polymerase alpha
Synthesizes RNA primer and initiates DNA synthesis of the lagging strand
Role of DNA polymerase beta
Repairs DNA