BIOL 1105 Lecture Notes - Lecture 12: Adenine, Thymine, Ultraviolet

57 views2 pages

Document Summary

Adds single nucleotides to growing dna strand to 3 end. Can"t begin strand - has to have short double stranded template at which to begin. Always add nucleotide to free 3"oh and always adds in a 5" to 3" direction - new strand grows in that direction. Dna polymerase extends primer rna polymerase makes primer. E coli model prokaryote has 3 dna polymerases. Each one has 3" to 5" exonuclease activity - a proofreading capability. Pol 1 (primer removal), pol 2 (repair), and pol 3 have diff roles in replication. Gyrase - removes supercoiling topoisomerase - dna replication is semi discontinuous. Dna is antiparallel - 2 strands have different orientations 5" to 3" and 3" to 5 . Dna polymerase only operates 5" to 3". Dna polymerases must operate in opposite direction on one strand replication fork. Opening of dna leads to two single strands forming a fork leading strand.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

Related Questions