GCSE Biology (OCR): Free Mock Test & Practice Questions

GCSE Biology (OCR)

Cell biology, organisation, infection, bioenergetics, homeostasis, ecology. OCR board.

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Free practice questions

Try 3 real GCSE Biology (OCR) questions

Have a go, then reveal the worked explanation. A taster from a bank of 213 original questions — unlock for unlimited drills and full timed mocks.

Q1. Which structure controls the movement of substances into and out of an animal cell?

A. Cell wall
B. Cell membrane
C. Nucleus
D. Cytoplasm

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✓ Answer: B. Cell membrane

The cell membrane is a partially permeable barrier that regulates what enters and leaves the cell. The cell wall is only found in plant cells and provides structural support, not selective transport. The nucleus controls the cell's activities by holding genetic material, but it does not manage the movement of substances across the cell boundary.

Q2. Enzymes are described as biological catalysts. What does this mean?

A. They speed up reactions without being used up themselves
B. They speed up reactions and are used up in the process
C. They slow down reactions to allow digestion to occur safely
D. They are only found in the digestive system

Show answer & explanation

✓ Answer: A. They speed up reactions without being used up themselves

A catalyst increases the rate of a chemical reaction without being changed or consumed itself, so one enzyme molecule can be reused repeatedly. This is different from a reactant, which is used up during the reaction.

Q3. A student says that antibodies produced against the flu virus will also work against the chickenpox virus. Why is this statement incorrect?

A. Antibodies are non-specific and destroy any pathogen equally
B. Antibodies have a shape complementary to a specific antigen, so each type only matches one pathogen's antigens
C. Antibodies only work against bacteria, not viruses
D. Antibodies are only produced after a person has fully recovered

Show answer & explanation

✓ Answer: B. Antibodies have a shape complementary to a specific antigen, so each type only matches one pathogen's antigens

Each antibody has a shape that is complementary to a specific antigen found on a particular pathogen, so antibodies produced against flu antigens will not fit and bind to the different antigens on chickenpox virus. This specificity is why a separate immune response is needed for each new pathogen encountered.

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GCSE Biology (OCR) — common questions

Frequently asked

How many questions are in the GCSE Biology (OCR)?

The exam has 40 questions. Every Revision Robin mock uses the same 40-question format so your practice matches the real thing.

What is the pass mark for the GCSE Biology (OCR)?

You need 24 out of 40 correct to pass, which is about 60%. Our mocks mark you against this exact threshold.

How long do you get?

The test is timed at 60 minutes. Our full mock runs on the same clock so you can practise your pacing.

Are these the real exam questions?

No. Our questions are original and written to match the current syllabus, so they give realistic practice without copying the official paper. Every answer comes with a plain-English explanation. Always confirm current rules and content with OCR.