All exams ← Home
Home · GCSE Combined Science (OCR)

GCSE Combined Science (OCR)

Trilogy-style mixed biology, chemistry and physics. OCR board.

Written against the published specification.

See all-access plans
Pass mark 24/40 60 minutes OCR How many can I get wrong?
About this practice. Revision Robin is built and maintained by Bloor Engineering Ltd, a UK-registered company. Our GCSE Combined Science (OCR) questions are written and reviewed in-house to match the current syllabus, each with a plain-English worked explanation. They are original practice material, not the official exam questions and not affiliated with or endorsed by OCR. Always confirm current test rules, fees and content with the official provider. See our Terms and Privacy.
Don't cram it, drill it. Ten questions a topic beats an hour re-reading.
Free practice questions
Try 3 real GCSE Combined Science (OCR) questions
Have a go, then reveal the worked explanation. A taster from a bank of 210 original questions. Unlock for unlimited drills and full timed mocks.
Q1. Which structure is found in a plant cell but not in an animal cell?
  • A.  Nucleus
  • B.  Cell wall
  • C.  Mitochondrion
  • D.  Cytoplasm
Show answer & explanation
✓ Answer: B. Cell wall
Plant cells have a rigid cell wall made of cellulose that supports and shapes the cell; animal cells have only a flexible cell membrane. Both cell types have a nucleus, mitochondria and cytoplasm, so these do not distinguish them.
Q2. Which factor is most likely to limit the rate of photosynthesis in a well-lit greenhouse on a warm summer day?
  • A.  Light intensity
  • B.  Carbon dioxide concentration
  • C.  Temperature
  • D.  Water availability
Show answer & explanation
✓ Answer: B. Carbon dioxide concentration
On a bright warm day, light and temperature are already high, so carbon dioxide concentration (normally only around 0.04% of air) becomes the limiting factor. This is why greenhouses are often supplemented with CO2 to boost growth.
Q3. Diamond and graphite are both giant covalent structures made of carbon. Why does graphite conduct electricity but diamond does not?
  • A.  Graphite contains ionic bonds while diamond does not
  • B.  Each carbon in graphite is bonded to only three others, leaving one delocalised electron per atom free to move; diamond's carbons are all bonded to four others with no free electrons
  • C.  Diamond has no covalent bonds at all
  • D.  Graphite has metallic ions that carry charge
Show answer & explanation
✓ Answer: B. Each carbon in graphite is bonded to only three others, leaving one delocalised electron per atom free to move; diamond's carbons are all bonded to four others with no free electrons
In graphite, each carbon atom forms three covalent bonds, leaving one delocalised electron per atom that can move between layers and carry charge. In diamond, every carbon forms four strong covalent bonds, so there are no free electrons or ions to conduct.
Exam mode
Full mock exam
40 random questions, real timing, marked against the official pass mark. Different every time.
The first 8 of 40 questions are free, with your score on them. Finishing the paper, your result against the pass mark and every answer explained come with the paid version.
Try it free
Topic drills
Ten quick questions on one topic, marked instantly with explanations.
1 free drill left.
Biology — cells, organisation & infection · 36
Biology — bioenergetics, homeostasis & ecology · 35
Chemistry — atoms, bonding & quantitative · 34
Chemistry — changes, rates & organic · 38
Physics — energy, electricity & particles · 32
Physics — forces, waves & magnetism · 35

Who has to sit the GCSE Combined Science (OCR)

Who needs a GCSE Combined Science (OCR)?

All students in England must study Science at GCSE; Combined Science is the most common option.

What it costs, and what a resit costs

How much does the GCSE Combined Science (OCR) cost?

Real exam fee: £113.50 (OCR official fee). Private candidates typically pay £100-£200, plus admin fees. Resit fee: Similar to original entry fee (£113.50, plus potential centre admin fees). Rebooking after a fail: Approximately one year; exams are summer-only.

How hard is it

How hard is the GCSE Combined Science (OCR)?

Difficulty: Content is more challenging than older GCSEs; covers less content than Triple Science.

Why people fail it

Why do people fail the GCSE Combined Science (OCR)?

Figures for the real exam from vertexaisearch.cloud.google.com, checked October 2026. Fees and rules change, so confirm with the test provider before you book.
GCSE Combined Science (OCR): common questions
Frequently asked
How many questions are in the GCSE Combined Science (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 Combined Science (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.