ap biology - dna replication: enzymes & strand synthesis

timestamps

• 0:00

  Welcome and Introduction

• 0:33

  Presenter Background

• 1:03

  Upcoming Topics Overview

• 1:34

  DNA Replication Overview

• 2:05

  DNA Structure Review

• 3:08

  Nucleotide Components

• 4:10

  Base Pairing Rules

• 5:15

  Hydrogen Bonds Explained

• 6:19

  Base Structures: Purines and Pyrimidines

• 8:03

  Pairing Justification

• 9:03

  Sugar-Phosphate Backbone

• 10:06

  DNA Directionality

• 11:07

  Nucleotide Stacking

• 12:09

  Lego Analogy for Ends

• 14:44

  Anti-Parallel Strands

• 16:47

  Handshake Analogy

• 17:48

  Semi-Conservative Replication

• 19:54

  Error Minimization

• 21:27

  Replication Key Players

• 23:09

  Replication Forks

• 24:11

  Helicase Function

• 25:12

  Single-Stranded Binding Proteins

• 27:16

  DNA Polymerase Introduction

• 28:52

  Polymerase Directionality

• 30:25

  Origin of Replication

• 32:33

  Coat Analogy Setup

• 33:35

  Leading Strand Explanation

• 35:09

  Lagging Strand Explanation

• 37:43

  Zipper Demo

• 40:16

  Okazaki Fragments

• 43:25

  Concurrent Replication

• 44:58

  Ligase Role

• 46:01

  Primase and Primers

• 48:35

  DNA Polymerase I

• 49:36

  Proofreading Process

• 51:11

  Error Rate Reduction

• 53:14

  Enzyme Review

• 54:16

  Enzyme Functions List

• 56:20

  Prokaryotic vs Eukaryotic DNA

• 57:55

  Polymerase Order

• 1:00:10

  Closing Remarks