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100+ Free Cambridge IAL Biology Practice Questions

Pass your Cambridge International A-Level Biology (9700) exam on the first try — instant access, no signup required.

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What term describes a non-competitive inhibitor of an enzyme?

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Key Facts: Cambridge IAL Biology Exam

9700

Cambridge syllabus code

CAIE

5 papers

Required for the full A-Level

CAIE 9700 syllabus

A*-E

Grading scale

CAIE

100

Free practice questions here

OpenExamPrep

Cambridge IAL Biology (9700) is a 5-paper pre-university qualification. P1 and P2 cover AS theory, P3 tests practical skills, P4 covers full A-Level theory, and P5 tests planning, analysis and evaluation. Exams are graded A*-E with May/June and October/November sittings worldwide.

Sample Cambridge IAL Biology Practice Questions

Try these sample questions to test your Cambridge IAL Biology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which organelle is the site of aerobic respiration in eukaryotic cells?
A.Mitochondrion
B.Chloroplast
C.Smooth endoplasmic reticulum
D.Golgi apparatus
Explanation: Mitochondria carry out the link reaction and Krebs cycle in the matrix, and oxidative phosphorylation on the inner membrane, producing the bulk of ATP in aerobic respiration.
2A student views a cell under a microscope. The image is 50 mm long and the actual cell is 100 micrometres. What is the magnification?
A.x 500
B.x 50
C.x 5000
D.x 0.002
Explanation: Convert units to the same scale: 50 mm = 50,000 micrometres. Magnification = image size / actual size = 50,000 / 100 = x 500.
3Which feature is found in prokaryotic cells but NOT in eukaryotic cells?
A.70S ribosomes as the only ribosome type
B.A plasma membrane
C.DNA
D.Cytoplasm
Explanation: Prokaryotes have only 70S ribosomes. Eukaryotic cells have 80S ribosomes in the cytoplasm, though their mitochondria and chloroplasts contain 70S ribosomes, supporting endosymbiotic theory.
4Which structure is responsible for producing ribosomal RNA in a eukaryotic cell?
A.Nucleolus
B.Smooth endoplasmic reticulum
C.Lysosome
D.Centriole
Explanation: The nucleolus is a dense region inside the nucleus where ribosomal RNA is transcribed and the small and large ribosomal subunits are assembled before export to the cytoplasm.
5Which type of microscope produces a 3D-looking image of a specimen's surface?
A.Scanning electron microscope (SEM)
B.Transmission electron microscope (TEM)
C.Light microscope
D.Phase-contrast microscope
Explanation: SEM scans the surface of a specimen with a focused electron beam, generating a high-resolution 3D-looking image of surface topography. TEMs produce 2D internal images.
6What is the function of the rough endoplasmic reticulum (RER)?
A.Synthesis and transport of proteins destined for secretion or membranes
B.Lipid and steroid synthesis
C.Hydrolytic digestion of worn-out organelles
D.Storage of cell sap and turgor pressure regulation
Explanation: Ribosomes attached to the RER synthesise proteins that enter the ER lumen, where they fold and are transported in vesicles to the Golgi for further modification and secretion.
7The resolution of a light microscope is limited by which factor?
A.The wavelength of visible light
B.The number of objective lenses
C.The size of the eyepiece graticule
D.The thickness of the cover slip
Explanation: Resolution depends on the wavelength of the radiation used. Visible light (around 400-700 nm) limits light microscope resolution to about 200 nm, whereas electrons have a much shorter wavelength.
8A virus that contains RNA, an envelope and a capsid is best described as a(n):
A.Enveloped RNA virus, such as HIV
B.Naked DNA virus, such as adenovirus
C.Bacteriophage with double-stranded DNA
D.Bacterium with a lipopolysaccharide envelope
Explanation: HIV is an enveloped RNA retrovirus. Its capsid encloses RNA and reverse transcriptase, and a lipid envelope studded with gp120/gp41 glycoproteins surrounds the capsid.
9An eyepiece graticule is calibrated using a stage micrometer. The eyepiece graticule has 50 divisions covering 1.0 mm on the stage micrometer at x 100 magnification. What is the value of one eyepiece division?
A.20 micrometres
B.2 micrometres
C.50 micrometres
D.200 micrometres
Explanation: 1.0 mm = 1000 micrometres covers 50 eyepiece divisions, so one division = 1000 / 50 = 20 micrometres. Calibration must be repeated for each objective.
10Which feature is unique to plant cells when compared with animal cells?
A.A cellulose cell wall
B.A nucleus
C.Mitochondria
D.Ribosomes
Explanation: Plant cells have a rigid cellulose cell wall outside the plasma membrane, providing structural support and limiting cell expansion. Animal cells lack a cell wall.

About the Cambridge IAL Biology Exam

Cambridge International A-Level Biology (syllabus 9700) is offered by Cambridge Assessment International Education. Candidates take 5 papers to achieve the full A-Level: P1 (40 multiple-choice questions on AS core, 1h 15min), P2 (AS structured short-answer, 60 marks, 1h 15min), P3 (Advanced Practical Skills, 40 marks, 2h), P4 (A-Level theory, 100 marks, 2h) and P5 (Planning, Analysis and Evaluation, 30 marks, 1h 15min). Content spans cell biology, biochemistry, physiology, genetics, ecology, evolution and genetic technology.

Questions

100 scored questions

Time Limit

P1 1h 15min, P2 1h 15min, P3 2h, P4 2h, P5 1h 15min; roughly 7h 45min total across 5 papers

Passing Score

Grade E is the minimum pass; A*-E count as passing grades on the A-Level certificate

Exam Fee

Set by exam centre; typical international entry fees £85-£130 per paper (Cambridge Assessment International Education (CAIE))

Cambridge IAL Biology Exam Content Outline

AS core

Cell structure

Eukaryotic and prokaryotic cells, organelles (nucleus, ER, Golgi, mitochondria, chloroplasts, ribosomes 80S/70S, lysosomes), microscopy (light, TEM, SEM), magnification, resolution, calibration, viruses

AS core

Biological molecules and enzymes

Water, carbohydrates (alpha/beta glucose, starch, glycogen, cellulose), lipids, proteins (1-4 structure, haemoglobin), nucleic acids, enzymes (Vmax, Km, inhibition, immobilised enzymes)

AS core

Cell membranes, transport and division

Fluid mosaic membrane, diffusion, osmosis (water potential), active transport, endo/exocytosis, mitosis and the cell cycle, meiosis and genetic variation

AS core

Transport in animals and plants

Mammalian heart and circulation, cardiac cycle, blood vessels, tissue fluid, haemoglobin and Bohr effect, xylem/phloem, transpiration, cohesion-tension theory, translocation, mass flow

AS core

Gas exchange, infectious disease and immunity

Alveoli, ventilation, spirometer, smoking diseases, pathogens (cholera, TB, HIV, malaria), antibiotic resistance, primary/secondary immune response, T and B cells, vaccination, monoclonal antibodies, ELISA

A-Level

Genetic control and protein synthesis

DNA replication, transcription, translation, gene mutations, lac operon, eukaryotic gene regulation, PCR, gel electrophoresis, recombinant DNA, restriction enzymes and ligase, GM bacteria

A-Level

Inheritance, selection and evolution

Monohybrid and dihybrid crosses, codominance, multiple alleles, sex-linkage, linkage and recombination, chi-squared test, natural selection, Hardy-Weinberg equation, speciation

A-Level

Energy, respiration and photosynthesis

Glycolysis, link reaction, Krebs cycle, oxidative phosphorylation, anaerobic respiration, RQ, light-dependent reactions (photosystems, photolysis), Calvin cycle, limiting factors, chromatography

A-Level

Homeostasis and coordination

Negative feedback, blood glucose regulation, kidney function and ADH, thermoregulation, neurones and action potentials, synapses, myelin and saltatory conduction, plant tropisms and auxin

A-Level

Ecology, biodiversity and conservation

Population growth and ecological niches, biodiversity measurement, conservation strategies, endangered species, sustainable resource use

How to Pass the Cambridge IAL Biology Exam

What You Need to Know

  • Passing score: Grade E is the minimum pass; A*-E count as passing grades on the A-Level certificate
  • Exam length: 100 questions
  • Time limit: P1 1h 15min, P2 1h 15min, P3 2h, P4 2h, P5 1h 15min; roughly 7h 45min total across 5 papers
  • Exam fee: Set by exam centre; typical international entry fees £85-£130 per paper

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Cambridge IAL Biology Study Tips from Top Performers

1Work through the 9700 syllabus learning outcomes one-by-one — questions in P1 and P2 map directly to single learning objectives
2For P1 MCQ, practise the 'best answer' technique and watch for distractors that swap related terms (e.g. RER vs SER, T helper vs T cytotoxic)
3For P3 and P5, rehearse using past-paper mark schemes — examiners reward specific independent/dependent/control variable language
4Learn the standard biological calculations: magnification = image / actual, water potential = ψs + ψp, and RQ = CO2 produced / O2 consumed

Frequently Asked Questions

What is Cambridge International A-Level Biology (9700)?

9700 is the CAIE syllabus for AS and A-Level Biology. The full A-Level has 5 papers: P1 multiple choice on AS theory, P2 AS structured, P3 Advanced Practical Skills, P4 A-Level theory, and P5 Planning, Analysis and Evaluation.

How many papers does 9700 have and how long are they?

Five papers. P1 is 1h 15min (40 MCQs), P2 is 1h 15min (60 marks structured), P3 is 2h (40 marks practical), P4 is 2h (100 marks structured), and P5 is 1h 15min (30 marks planning and analysis).

When are 9700 exams taken?

Cambridge IAL Biology exams are sat in the May/June and October/November series. A March series is also offered in India. Candidates can split AS and A2 components across sessions.

Do I need to do practical work for 9700?

Yes. Paper 3 is a 2-hour practical exam taken in a lab, worth 12% of the full A-Level. Paper 5 tests planning, analysis and evaluation of practical data and is worth a further 8%.