AP Biology Unit 4 Practice Test Room

Get ready for your AP Biology exam by practicing with unlimited free AP practice tests. Choose the units you want to focus on below.

Pick your exam
Which subject are you taking?
Units to include

Knowt can make mistakes. Consider checking important information.

2,500,000 +

students & teachers

2,000,000 +

notes created

320,000,000 +

flashcards created

Need to review more of AP Biology Unit 4?

We also got thousands of AP Biology resources like study guides, flashcard sets and more made by actual AP students.

go to AP

Everything you need to get a 5 on AP Biology in one place

In-depth study guides, flashcard sets, practice questions & more!

Take me there!
go to AP

Calculate how well you’ll do in AP Biology

Estimate your AP Biology score & see how much more you need to practice to get a 5 on AP Biology

AP Biology Score Calculator

Explore Top AP Biology Flashcards

flashcards Flashcard (75)
studied byStudied by 33 people
479 days ago
5.0(1)
flashcards Flashcard (191)
studied byStudied by 489 people
687 days ago
4.7(3)
flashcards Flashcard (114)
studied byStudied by 18 people
782 days ago
5.0(2)
flashcards Flashcard (23)
studied byStudied by 20 people
783 days ago
4.0(1)
flashcards Flashcard (40)
studied byStudied by 6125 people
363 days ago
4.1(53)
flashcards Flashcard (25)
studied byStudied by 10 people
274 days ago
5.0(1)
flashcards Flashcard (29)
studied byStudied by 19 people
266 days ago
5.0(1)
flashcards Flashcard (35)
studied byStudied by 2362 people
656 days ago
4.9(45)
View all top flashcards

Explore Top AP Biology Notes

note Note
studied byStudied by 56 people
786 days ago
5.0(1)
note Note
studied byStudied by 27 people
856 days ago
5.0(1)
note Note
studied byStudied by 70 people
651 days ago
5.0(2)
note Note
studied byStudied by 1232 people
658 days ago
5.0(4)
note Note
studied byStudied by 33 people
652 days ago
5.0(2)
note Note
studied byStudied by 9 people
895 days ago
5.0(1)
note Note
studied byStudied by 89 people
423 days ago
4.0(1)
note Note
studied byStudied by 1362 people
1 hour ago
5.0(11)
View all top notes

Studying for other AP Exams?

Prepare with multiple choice questions that test you on key concepts from that subject.

Go to Practice Test Room

AP Biology Exam Tips from Former AP Students

Blog image

AP Prep

Purine vs Pyrimidine: Key Differences & Bonds to Know

Introduction Purines and pyrimidines are the essential building blocks of all life. They make up DNA and RNA, molecules that carry the genetic code in all living organisms. They are two different families of nitrogenous bases that pair together in the DNA ladder and are vital to the structure of RNA. Without them, we wouldn’t be here! The unique properties and uses of purines and pyrimidines are SUPER important for DNA replication, transcription, and translation to be able to happen. In this article, you’ll learn exactly what purines and pyrimidines are, as well as their similarities and diffe...

Blog image

AP Prep

7 Things You Should Know Before You Sign up for AP Exams

Taking an AP course is a big step for students who want to be challenged and earn the plus of getting college credit. The excitement of possibly getting college credit can be overwhelming, but before you decide to take the AP exam, there are some important things to keep in mind, such as knowing where to find the right resources and AP Study Guides to make sure you get a 5! Knowing a few things about what AP exams you should take and which to avoid is SO IMPORTANT for your success in your AP courses. In this guide, we’ll walk you through the 7 essential things you should know before you regi...

Blog image

AP Prep

5 YouTube Channels That Saved Me During AP Bio

Free AP Biology Resources!!! To learn how to ace the AP Biology exam, avoid last-minute cramming and start early with AP test prep. After each in-class test, take time to review and reinforce your understanding of the material. Use AP flashcards, books, and of course, YouTube channels to help ace your exam. These online AP notes and AP Biology exam tips will provide go over pretty much everything you need to know! This comprehensive AP Biology Study Guide goes over the important stuff you actually need to know and how to pass the AP Biology exam – as written by a former AP Bio student! AP Biol...

Trusted by AP Biology students across the globe

Our community of students and teachers trust Knowt to create and study on.

Trusted by AP Biology students across the globe

Our community of students and teachers trust Knowt to create and study on.

starstarstarstarstar

LITERAL SAVING GRACE

Knowt it the ONLY reason i got a 5 on the AP Human Geo exam without them i would have probably gotten a one.

starstarstarstarstar

Amazing app!

The multiple choice practices on here were very similar to those on the exam and they truly helped me. Definitely recommend!

starstarstarstarstar

BEST APP EVER

I did not study at all for APUSH on my own. I only did the multiple choice knowt offers for a week straight and got a 5. without this app I would've gotten a 2 😭🙏

starstarstarstarstar

100% worth downloading

This app saved me a lot with AP US History and is the reason I got a 5, and passed my AP precalc exam. Super helpful with flash cards and explanations! : )

starstarstarstarstar

Best App for AP Season!!!

I just got my scores back and I passed all 5 APs because of knowt. Even with cramming last minute. 🥳

starstarstarstarstar

knowt literally saved me

i got a 5!! having the MCQ practice was amazing. the prompts for the written portion were so nice; they were challenging yet easy to understand and were similar to the ones on the test.

starstarstarstarstar

i could marry this app

thought i had no hope in passing my APs but after I downloaded this app not even 15 days before the exam i somehow managed to get a 4 on ap macro?? this app does miracles

starstarstarstarstar

saved by ap score

OH MY GOD THIS JS THE MOST USEFUL APP EVER. when i was studying for my ap test it was so useful to be able to have it auto grade frq's and give unique mcq's cause the college board ones are so repetitive.

starstarstarstarstar

I love it

My favorite part about this app is the practice multiple choice tests. Not only are you able to customize the tests to include specific units and material, but you're also able to see why an answer is correct or incorrect.

FAQWe thought you might have some questions...
How do I practice for Unit 4 of the AP Biology exam?
You can break up your studying for Unit 4 into three main steps: study, practice, and review.
  • Study: Begin by studying the key concepts from Unit #. Go over any class materials, notes, and tests that cover this unit, and refer to AP Biology study guides specific to Unit 4.
  • AP Practice: Mastering $Unit 4 is all about being able to recall information quickly. Use the AP Biology Unit 4 Practice Test Room to do daily rounds of Unit 4 practice questions related to reinforce your understanding.
  • Review: As you practice, take note of the questions you get wrong and go back to review those topics. Focus your practice on the specific areas in $Unit 4 that are causing confusion.
How do I find AP Biology Unit 1 practice exams on classroom?
For free AP Biology Unit 1 practice exams, AP Classroom has lots of multiple-choice question sets. Once you finish those, you’ll find a lot more free ones on this page!
Where can I find good practice problems for AP Biology Unit 4?
For Unit 4 of the AP Biology exam, basic practice problems won't be enough. Head to the AP Biology Practice Test Room to find practice questions designed specifically to prepare you for the types of multiple-choice questions you may encounter on Unit 4, featuring different levels of difficulty.
How can I self-study AP Biology Unit 4?
Self-studying Unit 4 of AP Biology is doable, but requires some focus. Since you won't have a teacher assigning questions, make sure to practice often. Review past materials released by the College Board for Unit 1, run through Unit 1 questions in the AP Biology Practice Test Room daily, and work on your FRQs. You can also find practice for the other units on the AP Biology Practice Test Room.
How do I cram for Unit 4 of the AP Biology exam last minute?
If you’re cramming for Unit 4 at the last minute, here’s a plan:
  • Determine how many days you have left before the test and create a realistic study plan divided into three intervals.
  • In the first interval, review your Unit 4 materials from class and find free AP Biology Unit 4 resources to reinforce your knowledge.
  • During the second interval, practice lots of Unit 4 questions and go through vocabulary flashcards daily. Track questions you get wrong, and focus on those topics.
  • In the third interval, focus on reviewing your mistakes, identifying problem areas, and doing targeted practice on challenging Unit 4 concepts.