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Turn your biology notes into a free practice test

Skip generic question banks. Upload your lecture slides, notes or textbook chapters and get multiple-choice, true/false or short-answer questions written from your own course material, each with an explanation.

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Why a custom practice test beats a generic PDF

Many free biology practice test PDFs posted online are generic, so they rarely line up with your syllabus, your textbook edition or the examples your instructor used in class. DeckOwl works from the material you already have, so the questions cover the cell structures, pathways and genetics you need for your exam.

  • Questions are drawn from your own lecture slides, notes and readings
  • Multiple-choice, true/false and short-answer formats with explanations
  • Free plan includes three generations a month, with no exports
  • PDF export is available on Plus, which also supports unlimited generations
Example biology practice questions
Where does the Calvin cycle take place in a chloroplast?The stroma. Carbon fixation and the conversion of ATP and NADPH into sugar happen there, while the light reactions occur in the thylakoid membranes.
True or false: mitochondria contain their own circular DNA.True. Mitochondria carry a small circular genome that encodes some of their own proteins, which supports the endosymbiotic origin of the organelle.
What is the net ATP yield of glycolysis per glucose molecule?2 ATP. Glycolysis produces 4 ATP and uses 2, leaving a net gain of 2.
In a cross of two heterozygous (Aa) parents, what fraction of offspring are expected to be aa?One in four (25%). The Punnett square gives AA, Aa, Aa and aa, so only one of four offspring is homozygous recessive.
How many sodium and potassium ions does the sodium-potassium pump move per cycle?Three Na+ out of the cell and two K+ into the cell, using one ATP. This maintains the gradient that neurons depend on for signaling.
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Built from your material

Questions come from the PDFs, slides, DOCX files, text notes or photos of pages you upload, so they match what your instructor actually covered.

Explanations for every answer

Each question includes a short explanation of why the correct answer is right, so missed questions become study points instead of dead ends.

Study with spaced repetition

Turn the same material into flashcards and review them on a spaced schedule that brings back the topics you are most likely to forget.

How it works

Upload your biology material

Add a lecture PDF, slide deck, DOCX file, pasted notes or a photo of a textbook page.

Choose the question types

Pick multiple-choice, true/false or open questions and how many you want to practice.

Take the test and review

Work through the questions in your browser, then read the explanations for anything you missed.

The free plan lets you generate three practice tests a month and study them in the browser. If you want a printable copy, PDF export is included in the Plus plan at $39 a year or $7.99 a month, and Plus also exports DOCX, Anki and CSV files. Students with a school email get 40% off, and no credit card is needed to start.

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Frequently asked questions

How many questions should a biology practice test include?

For a single chapter or lecture, 15 to 25 mixed questions is a practical length for a focused session. For a midterm or final, split the material into sections and test each one separately so you can see which topics need more review.

What biology topics should a practice test cover?

Focus on the core units your course emphasizes, such as cell biology, metabolism, genetics and homeostasis, and make sure the questions reflect your own lecture notes. Spend the most questions on concepts you keep getting wrong on earlier quizzes.

Can I get a free biology practice test as a PDF?

The free plan lets you generate three tests a month and study them in the browser, but it does not include exports. PDF export is available on the Plus plan.

Do I need a credit card to start?

No. You can create an account and generate your first practice test without adding a credit card.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.