← Cambridge O Levels

Biology

Cambridge O Levels · Code 5090

Topics ko order mein karo, har lesson ke baad recall test karo, phir past papers se exam-style questions practise karo.

1 Learn

Explanation parho aur Pakistan-relevant example dekho.

2 Recall

Key-point card se yaad karo, lesson dobara khole bagair.

3 Apply

Quiz attempt karo, mistakes note karo, weak concept par wapas jao.

Topic list

01

Cell Structure

Exploring cells, the fundamental units of life, and their specialised structures.

29 QReady02

Nutrition & Enzymes

The breakdown and absorption of food, powered by biological catalysts called enzymes.

30 QReady03

Ecology & Environment

Explores organism interactions, energy flow, nutrient cycles, and human environmental impact.

30 QReady04

Human Body Systems

The structure and function of the circulatory, digestive, and respiratory systems.

30 QReady05

Reproduction & Genetics

Cell division, inheritance, and the mechanisms of sexual and asexual reproduction.

29 QReady06

Disease & Immunity

Explores how pathogens cause disease and how the body's immune system and medicine fight back.

30 QReady07

Transport in Humans

Explores the human circulatory system, including the heart, blood vessels, and blood.

30 QReady08

Scientific Enquiry and Practical Skills

Mastering the scientific method, from hypothesis to conclusion, for practical biology.

5 QReady09

Cell Division & Genetics

Mitosis, meiosis, chromosomes, genes and inheritance patterns

8 QReady10

Evolution & Biodiversity

Natural selection, adaptation, classification and species variation

5 QReady11

Human Physiology — Circulation

The circulatory system, heart structure, blood components and transport

7 QReady12

Plant Biology & Photosynthesis

Photosynthesis, plant cells, transport in plants, tropisms

8 QReady13

Excretion and the Kidney

Understand how your body removes harmful metabolic waste through the incredible filtration system of your kidneys and the process of urine formation.

5 QReady14

Coordination and Response

Master how your body's nervous and hormonal systems work together to react to the world, and how plants respond to their environment.

5 QReady

How to turn Biology revision into marks

Biology answers need precise structure-function links, ordered processes, and evidence from diagrams or data. Long paragraphs do not earn marks unless each sentence explains the mechanism being tested.

Answer method

  1. Name the structure, process, variable, or relationship before describing detail.
  2. Put multi-stage processes in the correct order and state what moves, changes, or is produced.
  3. Use values, trends, labels, and comparisons from the supplied figure instead of retelling the topic.
  4. For evaluation, distinguish what the result supports from what the evidence cannot establish.

Common traps

  1. Using near-synonyms where the biological term has a precise meaning.
  2. Explaining purpose without the mechanism, or mechanism without linking back to function.
  3. Ignoring units, controls, anomalies, sample size, or repeats in data and practical questions.
  4. Writing every fact remembered instead of following the command word and mark allocation.

Practice rhythm

  1. Draw and label one process or structure from memory, then compare it with the lesson.
  2. Turn a key point into a because-therefore explanation and a data-based question.
  3. Practise one calculation or graph task alongside one structured explanation.
  4. Keep a vocabulary list of terms you used too broadly and rewrite the affected answer.

Official material and timed practice

These lessons support revision; confirm the current Cambridge International specification and school exam-entry advice before planning your papers.

Official syllabusOfficial resourcesSaved syllabus PDFPast-paper desk