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Turn your MCAT notes into a practice test PDF

There is no library of ready-made MCAT tests here. DeckOwl builds practice questions from the material you already study, with explanations for every answer.

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Drop files here or browsePDF, DOCX, PPTX, text or photos of your notes · several files with Plus

Free · First set needs no signup · Creates quizzes in seconds

Why a custom practice set beats a generic download

Most free MCAT practice test PDFs are written for a general audience, so their topics rarely line up with the chapters you are reviewing this week.

Questions drawn from the chapters you actually uploaded
Explanations that show why each wrong option is wrong
Browser study on the free plan, with PDF export on Plus
Custom sets you can regenerate as your review changes

Example MCAT biochemistry practice questions with answers

Which organelle is the primary site of oxidative phosphorylation?The inner mitochondrial membrane, where the electron transport chain and ATP synthase are located.

In a buffer where pH equals pKa, what is the ratio of conjugate base to weak acid?1:1, because log(1) is 0, so the Henderson-Hasselbalch equation gives pH equal to pKa.

True or false: increasing substrate concentration lowers an enzyme's Km.False. Km is a property of the enzyme-substrate pair and does not change with how much substrate is present.

What does a competitive inhibitor change on a Michaelis-Menten plot?It raises the apparent Km while Vmax stays the same, because extra substrate can outcompete the inhibitor.

What reaction does citrate synthase catalyze in the citric acid cycle?It condenses acetyl-CoA with oxaloacetate to form citrate, which is the first step of the cycle.

Generate the full set

Upload your own material

Add PDFs, DOCX, PPTX, plain text notes, or photos of pages. Text in photos is read with text recognition.

Multiple-choice, true/false, and short answer

Each question includes an explanation, so a wrong answer shows you the concept you missed.

Study in the browser or export

The free plan includes 3 generations per month and browser study. Plus adds unlimited generations and PDF export.

How it works

Upload your MCAT notes

Add the chapter PDFs, slides, or typed notes you are reviewing this week.

Pick your question types

Choose multiple-choice, true/false, or short answer, then generate the set.

Answer and read the explanations

Work through the questions, then review the explanations for anything you missed.

A set built from your own notes targets the exact gaps in your review. You can rerun it on a new chapter as your schedule moves forward.

Explanations matter as much as the answer key. Reading why each wrong option fails shows you the reasoning the exam tests, not only the fact.

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Frequently asked questions

How do I study MCAT biochemistry questions effectively?

Explain why each wrong option is wrong, not only why the right one is right. Then retest the same concept a day or two later to see whether it has stuck.

Should I take full-length practice tests or topic quizzes?

Topic quizzes are useful while you are learning a subject, because they isolate one concept at a time. Mixed sets closer to exam day test whether you can switch between subjects.

Can the free plan download a practice test as a PDF?

No. The free plan includes 3 generations per month and studying in the browser, while PDF export requires Plus at $39/year or $7.99/month.

Can I start without a credit card?

Yes. You can start on the free plan without a credit card, and students get 40% off with a school email.

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