A-level Biology

2.1: Testing for biological molecules

2.2: Carbohydrates and lipids

2.3: Proteins

2.4: Water

3.1: Mode of action of enzymes

3.2: Factors that affect enzyme action

4.1: Fluid mosaic membranes

4.2: Movement into and out of cells

5.1: Replication and division of nuclei and cells

5.2: Chromosome behaviour in mitosis

6.1: Structure of nucleic acids and replication of DNA

6.2: Protein synthesis

7.1: Structure of transport tissues

7.2: Transport mechanisms

8.1: The circulatory system

8.2: Transport of oxygen and carbon dioxide

8.3: The heart

9.1: The gas exchange system

10.1: Infectious diseases

10.2: Antibiotics

11.1: The immune system

11.2: Antibodies and vaccination

12.1: Energy

12.2: Respiration

13.1: Photosynthesis as an energy transfer process

13.2: Investigation of limiting factors

14.1: Homeostasis in mammals

14.2: Homeostasis in plants

15.1: Control and coordination in mammals

15.2: Control and coordination in plants

16.1: Passage of information from parents to offspring

16.2: The roles of genes in determining the phenotype

16.3: Gene control

17.1: Variation

17.2: Natural and artificial selection

17.3: Evolution

18.1: Classification

18.2: Biodiversity

18.3: Conservation

19.1: Principles of genetic technology

19.2: Genetic technology applied to medicine

19.3: Genetically modified organisms in agriculture