Cambridge O Level Biology
Exam Questions

Animal & Plant Cells, Animal & Plant Cells Under the Microscope, Bacterial Cells

Organisation of Cells, Magnification Formula

Classifying Organisms

The Five Kingdoms, Viruses

Diffusion, Factors that Influence Diffusion, Water, Osmosis, Osmosis Experiments, Osmosis in Animals & Plants

Active Transport, Importance of Active Transport

Chemicals & Life, Food Tests

Enzymes, Enzyme Action & Specificity

Enzyme Investigations, Enzymes: Temperature & pH

Photosynthesis, Chlorophyll, Use & Storage of Carbohydrates, Investigating the Need for Chlorophyll, Light & Carbon Dioxide, Factors Affecting the Rate of Photosynthesis, Investigating the Rate of Photosynthesis, Limiting Factors

Leaf Structure, Identifying Leaf Structures in a Dicotyledonous Plant

Minerals in Plants

Root Hair Cells, Pathway Taken by Water

Transpiration, Investigating Temperature & Wind Speed, Transpiration Stream, Explaining the Effects of Temperature, Wind Speed, Humidity & Light Intensity, Translocation, Xylem & Phloem

Diet & Deficiencies

Organs of the Digestive System, Physical Digestion, Teeth & Digestion, Chemical Digestion, Enzymes in Digestion, Hydrochloric Acid, Emulsification of Fats & Oils, Peristalsis

Absorption, Adaptations of the Small Intestine

Features of Gas Exchange Surfaces, The Breathing System, Investigating the Differences in Inspired & Expired Air, Investigating the Effects of Physical Activity on Breathing, Identifying Intercostal Muscles, Volume & Pressure Changes in the Lungs, Protecting the Breathing System

Respiration in Cells

Aerobic Respiration

Anaerobic Respiration

Circulatory System

The Mammalian Heart, Functioning of the Heart, Monitoring Activity of the Heart, Investigating Effect of Physical Activity on Heart Rate, Coronary Heart Disease

Blood Vessels, Circulation Around the Body, Structure & Function of Blood Vessels

Components of Blood, Tissue Fluid

Pathogens & Barriers, Vectors of Disease, Human Immunodeficiency Virus (HIV), Cholera, Controlling the Spread of Disease, Excessive Alcohol Consumption, Effects of Tobacco Smoke

Antibiotics

Active Immunity, Antigens & Antibodies, Vaccination, Preventing the Spread of Disease, Passive Immunity & Breastfeeding, HIV & the Immune System

Excretion of Carbon Dioxide & Urea

The Kidney, The Role of the Liver in Excretion

Mammalian Nervous System, Types of Neurones, The Reflex Arc, The Synapse

Sense Organs, The Eye

Hormones in Humans, The Hormone Adrenaline

Homeostasis

Homeostasis: Temperature Control

Controlling Blood Glucose Concentration

Tropisms

Chromosomes & Cells, Mitosis, Meiosis, Uncontrolled Cell Division

Asexual Reproduction, Sexual Reproduction

Flower Structure & Pollination Method, Self & Cross-pollination, Fertilisation in Plants, Seeds & Germination, Seed & Fruit Dispersal

The Reproductive Systems, Gametes & Fertilisation, Development of the Zygote, Sexual Hormones in Humans

Variation

DNA Structure, Genes & Protein Production

Inheritance: Definitions, Monohybrid Inheritance, Codominance & Sex Determination, Mutation

Natural Selection, Antibiotic-Resistant Bacteria & Selection, Artificial Selection

Biotechnology, Usefulness of Bacteria, Fermenters

Genetic Modification

The Sun as a Source of Energy, Food Chains & Food Webs, Efficiency of Energy Transfer, Pyramids of Number, Biomass & Energy

The Carbon Cycle, The Nitrogen Cycle

Populations, Communities & Ecosystems, The Importance of Biodiversity

Deforestation, Over-harvesting & Introducing Non-native Species, Water Pollution, Other Pollution

Reasons for Conservation, Sustainability