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Cambridge Biology Syllabus: Topics, Papers and Where Marks Are Lost

What Cambridge Biology covers, how its papers are arranged, what makes it hard, and the specific ways candidates lose marks in it.

What Biology looks like in Cambridge is set by how Cambridge examines it: multiple components per subject, with practicals examined as separate papers in the sciences. The topic areas matter, but the format decides how you should work them.

At a glance
Subject
Biology
Examined by
Cambridge
Format here
Multiple components per subject, with practicals examined as separate papers in the sciences
Depth
International depth, with syllabuses written to be taught over two years and examined in components
What the grade does
A grade read by admissions officers worldwide without translation
Papers
Objective, essay, and a practical or alternative to practical.
Required for
Medicine, pharmacy, nursing, agriculture, biochemistry, microbiology and every life science course

How Cambridge examines this subject

The format is multiple components per subject, with practicals examined as separate papers in the sciences, and it is marked against published assessment objectives, with grade thresholds set after each series.

This is the certificate you sit when the destination is outside Nigeria, and the portability is what you are paying for.

The paper structure, and how to weight your time

Objective, essay, and a practical or alternative to practical.

Split your preparation roughly in the proportion the components are weighted. Candidates habitually over-prepare the part they enjoy and meet the other part for the first time in the hall.

What makes it hard

The practical rewards handling specimens, and candidates from schools without a working laboratory are examined on skills they have never performed.

Set that against how this examination works. The syllabus assumes teaching most Nigerian schools do not provide, particularly in the sciences, which is why entering privately is difficult here.

Where marks are lost in this subject

  • Drawing biological diagrams without labelling lines, which loses the label marks entirely.
  • Writing general answers where the question asks for a named example.
  • Treating the practical as a theory paper and describing rather than observing.
The single most useful habit

Practise drawing to scale with a sharp pencil and ruled label lines. Presentation marks in the practical are the easiest marks in the subject.

Turning it into a plan

  1. Get the current syllabus from Cambridge and check the year range on the cover.
  2. Write one line per topic area, with a box beside it.
  3. Work a past paper in this examination’s format, multiple components per subject, and tag every question back to a line.
  4. Mark the lines your teaching has never covered. Those are the priority.
  5. Re-weight towards the component carrying the most marks. Two series a year, June and November, with a formal enquiry-about-results process afterwards.

What a good grade here is worth

In this examination the grade is a grade read by admissions officers worldwide without translation. Biology is required for medicine, pharmacy, nursing, agriculture, biochemistry, microbiology and every life science course, and course requirements are checked subject by subject, so a strong overall result with a weak grade here is a disqualification for the course that names it rather than a near miss.

Biology: common questions

How many papers are there?

Objective, essay, and a practical or alternative to practical.

What makes it hard?

The practical rewards handling specimens, and candidates from schools without a working laboratory are examined on skills they have never performed.

What is the most common way candidates lose marks?

Drawing biological diagrams without labelling lines, which loses the label marks entirely.

Where do I get the official syllabus?

From Cambridge, on its own site, free. Check the year range on the cover before you use it.

Has the syllabus changed?

Syllabuses are revised on published cycles and old ones stay online after they expire. If the copy you are holding has no year range, you do not know what you are holding.

How do I turn it into revision?

One line per topic area with a box beside it, then tick the lines off against past papers rather than against your notes. The lines that stay blank are the finding.

Is Biology compulsory?

No. It is a science subject, chosen as one of your electives, and you should choose it because a course you want names it.

What is it required for?

Medicine, pharmacy, nursing, agriculture, biochemistry, microbiology and every life science course.

What the subject covers

Use these topic areas as the frame for your own checklist, then verify the detail against the syllabus Cambridge publishes itself, because depth and emphasis shift between curriculum cycles even when the headings do not.

  • The cell and cellular organisation.
  • Classification of living things.
  • Nutrition, transport, respiration, excretion and regulation.
  • Reproduction, growth and development.
  • Heredity and variation.
  • Evolution.
  • Ecology, habitats and conservation.
  • The effects of human activity on the environment.

More on this subject

Sources

  1. Cambridge Assessment International Education. www.cambridgeinternational.org
Verified against the awarding body’s own published material on 15 September 2026. Fees, dates and thresholds are set each cycle: take those from the body’s own announcement for your year.
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