AS Level Biology · OCR (legacy)

Dates Available

Week 1: Monday 28 March – Friday 1 April
Week 2: Monday 4 – Friday 8 April
Week 3: Monday 11 – Friday 15 April

Boards
OCR H021

Length of Course
20 hours

Times
9am to 1pm daily

The course focuses on topics that many students find difficult. Extensive use is made of past exam questions to emphasise answering techniques. Revision notes and model answers will be provided, where appropriate.

The course will cover the following:

Unit 1 F211 · Cells, Exchange and Transport 

Module 1 Cells

  • The structure and functions of cell organelles
  • The fluid-mosaic model of membrane structure
  • Similarities and differences between diffusion, facilitated diffusion,osmosis, active transport, endocytosis and exocytosis
  • Chromosome behaviour during mitosis
  • Stem cells and how specialised cells are adapted to their functions

Module 2 Exchange and Transport

  • Adaptations of alveoli for gaseous exchange
  • The cardiac cycle and its control by the SAN (pacemaker)
  • Dissociation curves of haemoglobin showing the release of oxygen from the blood
  • Structural adaptations of xylem vessels for the transpiration stream
  • The mass flow theory of translocation in the phloem

Unit 2 F212 · Molecules, Biodiversity, Food and Health 

Module 1 Biological molecules

  • The fundamental importance of water to living organisms
  • Similarities and differences between proteins, carbohydrates and lipids
  • DNA replication
  • Enzyme structure and the effects of temperature, pH, concentrations and inhibitors on enzyme activity

Module 2 Food and Health

  • The causes and effects of coronary heart disease
  • The spread and control of malaria, TB and AIDS
  • The roles of T and B lymphocytes, phagocytes and antibodies in the immune response
  • The adverse effects of smoking on the gaseous exchange and circulatory systems

Module 3 Biodiversity and Evolution

  • The biodiversity of species and habitats and their importance in medicine, food production and as genetic resources
  • The importance of variation and natural selection in evolution
  • Links between topics will be emphasised e.g. the importance ofprotein structure in the functioning of enzymes, membrane proteins  and antibodies

F213 (Practical skills) not covered in this course.