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  3. AP Biology - 2019 Exam FRQ Review: Version O

ap biology - 2019 exam frq review: version o

originally streamed in 2019 with Caroline KoffkeTeacher
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Learn how to approach the 2019 AP Biology Version O Free Response Questions with detailed explanations of what graders look for. This complete FRQ walkthrough helps you understand the scientific reasoning and analysis skills needed for exam success. ...more

curriculum note

This video reviews the 2019 AP Biology FRQ Version O exam; the AP Biology exam format and scoring rubrics may have changed since 2019, so students should verify current expectations with the latest College Board materials.

covered in this stream

units
Exam Skills
topics
2019 Exam Review - Version O FRQ2019 FRQ Review

timestamps

  • 0:00

    Exam Review Introduction

  • 0:35

    Version O Explanation

  • 1:06

    Question 1 Overview

  • 1:38

    Transcription Arrow Identification

  • 2:09

    Enzyme Y Nonfunctionality

  • 2:40

    Gene Trip Deletion Prediction

  • 3:41

    Feedback Mechanism Explanation

  • 4:12

    Ecological Relationship Identification

  • 4:43

    IAA Production Advantage

  • 5:47

    Bacterial Cheater Advantage

  • 6:50

    Carbon Molecule Reduction Prediction

  • 7:22

    Question 2 Overview

  • 7:53

    Growth Curve Graphing

  • 8:56

    Axes and Intervals Labeling

  • 9:59

    Population Size Reasoning

  • 10:29

    Competition Evidence Pieces

  • 11:33

    Population Growth Limits

  • 12:05

    Contractile Vacuole Prediction

  • 12:37

    Vacuole Activity Discussion

  • 13:42

    Treatment Group Controls

  • 15:16

    Question 3 Overview

  • 15:47

    PDC Location Identification

  • 16:18

    NADH Production Claims

  • 17:21

    Electron Transport Chain

  • 17:52

    PDC Deficiency Mutation

  • 18:54

    Offspring Probability Calculation

  • 19:26

    Question 4 Overview

  • 19:58

    Neurotoxin Immediate Effect

  • 20:29

    Membrane Potential Prediction

  • 21:00

    Model A Effectiveness

  • 21:31

    Model B Ineffectiveness

  • 22:02

    Question 5 Overview

  • 22:33

    Divergence Rate Calculation

  • 23:06

    Cladogram Construction

  • 23:39

    Gibbons Outgroup Reasoning

  • 24:40

    Species Descent Circle

  • 25:12

    Question 5 Questions

  • 25:42

    Question 6 Overview

  • 26:14

    Mutant Growth Reasoning

  • 26:45

    Diploid Strain Prediction

  • 27:48

    Treatment Results Debate

  • 28:18

    Question 7 Overview

  • 28:49

    Gene G Identification

  • 29:19

    Gene Regulation Reasoning

  • 29:50

    Question 7 Difficulty

  • 30:21

    Question 8 Overview

  • 30:53

    pH Increase Component

  • 31:23

    Vacuole Swelling Reasoning

  • 31:53

    Closing Remarks

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Fiveable

Study Content & Tools

Study GuidesFRQs + AI ScoringAP Essay Grader for StudentsAI Grading for TeachersPractice QuestionsGlossaryScore Calculators

Company

What's New?PricingBulk DiscountsTestimonialsFAQsEmail us

Resources

AP Exam Schedule 2027AP Exam AccommodationsAP ClassesAP ClassroomEasiest AP ClassesHardest AP ClassesAP vs IBAP vs Dual EnrollmentAP vs Honors ClassesAP Scholar Awards

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
RefundsTermsPrivacyCCPAAI TransparencySchool Data Privacy

© 2026 Fiveable Inc. All rights reserved.

AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.