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ap biology - dna replication & gene expression

originally streamed in 2020 with Jessica NadzamTeacher
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Learn how DNA replication, transcription, and translation work in this AP Biology Unit 6 review. This video breaks down the central dogma of molecular biology, walking you through how genetic information flows from DNA to RNA to proteins—key concepts ...more

covered in this stream

units
Unit 6 – Gene Expression and Regulation
topics
6.1 DNA and RNA Structure 6.2 DNA Replication6.3 Transcription and RNA Processing6.4 TranslationDNA Replication, Transcription, and Translation

timestamps

  • 0:00

    Session Introduction

  • 2:04

    Overview of Topics

  • 3:38

    DNA Replication Basics

  • 5:10

    Nucleic Acid Structure

  • 7:12

    Base Pairing Rules

  • 9:46

    Hydrogen Bonds Explained

  • 11:52

    Hershey-Chase Experiment

  • 14:26

    Cell Cycle and Replication

  • 15:56

    Replication Process

  • 17:30

    Key Enzymes Overview

  • 19:36

    Helicase Function

  • 20:38

    Topoisomerase Role

  • 21:09

    DNA Polymerase

  • 22:41

    Semi-Conservative Model

  • 23:43

    Anti-Parallel Strands

  • 25:47

    Leading Strand

  • 26:19

    Lagging Strand Fragments

  • 28:36

    Central Dogma Introduction

  • 30:08

    Gene-Protein Hypothesis

  • 32:43

    Transcription Process

  • 35:52

    RNA Polymerase

  • 37:58

    RNA Processing

  • 39:04

    Cap and Tail Addition

  • 40:11

    Translation Overview

  • 43:17

    Initiation and Elongation

  • 44:53

    Codons and Amino Acids

  • 45:56

    Gene Expression Summary

  • 46:59

    Final Questions

  • 50:08

    tRNA and mRNA Differences

  • 53:20

    Session Wrap-Up

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history

🌎 ap world history🇺🇸 ap us history🇪🇺 ap european history

social science

✊🏿 ap african american studies🗳️ ap comparative government🚜 ap human geography💶 ap macroeconomics🤑 ap microeconomics🧠 ap psychology👩🏾‍⚖️ ap us government

english & capstone

✍🏽 ap english language📚 ap english literature🔍 ap research💬 ap seminar

arts

🎨 ap art & design🖼️ ap art history🎵 ap music theory

science

🧬 ap biology🧪 ap chemistry♻️ ap environmental science🎡 ap physics 1🧲 ap physics 2💡 ap physics c: e&m⚙️ ap physics c: mechanics

math & computer science

🧮 ap calculus ab♾️ ap calculus bc📐 ap precalculus📊 ap statistics💻 ap computer science a⌨️ ap computer science p

world languages

🇨🇳 ap chinese🇫🇷 ap french🇩🇪 ap german🇮🇹 ap italian🇯🇵 ap japanese🏛️ ap latin🇪🇸 ap spanish language💃🏽 ap spanish literature

career kickstart

💼 ap business with personal finance🔒 ap cybersecurity

go beyond AP

high school exams

✏️ PSAT🎓 Digital SAT🎒 ACT

honors classes

🍬 honors algebra II🫀 honors anatomy🐇 honors biology👩🏽‍🔬 honors chemistry💲 honors economics📐 honors geometry⚾️ honors physics📏 honors pre-calculus📊 honors statistics🗳️ honors us government🇺🇸 honors us history🌎 honors world history

college classes

👩🏽‍🎤 arts👔 business🎤 communications🏗️ engineering📓 humanities➗ math🧑🏽‍🔬 science💶 social science

hs classes

🏛️ alabama history⛰️ appalachian studies🌴 california history🌍 earth science🌐 ethnic studies🐊 florida history🍑 georgia history🌎 global studies🌺 hawaiian studies📰 journalism🪶 native american studies🌵 new mexico history🤠 oklahoma history⚗️ physical science🎙️ speech and debate🤝 texas government🤠 texas history🌲 washington state history🕊️ world religions
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© 2026 Fiveable Inc. All rights reserved.

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