DNA Polymerase Study Guide Test.
DNA Polymerase Study Guide Test. DNA Polymerase - CORRECT ANSWER Enzyme that assembles nucleotides into a new DNA strand DNA Polymerase I - CORRECT ANSWER DNA repair and some replication. Highest concentration DNA Polymerase II - CORRECT ANSWER DNA repair. Middle concentration DNA Polymerase - CORRECT ANSWER Have 3'-5' exonuclease; proofreading ability - keeps mutation rate below a certain level. Can only polymerize in a 5'-3' direction. Can only add nucleotides to an existing strand; can't start a new DNA strand DNA Polymerase III - CORRECT ANSWER Holoenzyme, dimer of the core polymerase. Adds DNA nucleotides on to the end of the 3' primer. Majority of DNA replication. Lowest concentration Replisome - CORRECT ANSWER DNA Polymerase III holoenzyme + other enzymes and accessory molecules. Helicase - CORRECT ANSWER Circular enzyme that uses ATP to pry open DNA strands Primase - CORRECT ANSWER Replicates/synthesizes the start of a new strand, the primer. Uses RNA in a 3'-5' way
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