A2 Level Biology · OCR (legacy)

Dates Available
Week 1: Monday 3 - Friday 7 April
Week 2: Monday 10 - Friday 14 April
Week 3: Monday 17 - Friday 21 April

OCR H421

Length of Course
20 hours

2pm to 6pm daily

The course examines key topic areas and extensive use will be made of exam-based A2 level questions to illustrate relevant principles. Revision notes and model answers will be provided, where appropriate.

The course will cover the following:

Unit 4 F214 · Communication, Homeostasis and Energy

• The principles of homeostasis: stimuli, receptors, a control centre and effectors
• Why certain factors have to be controlled for a stable metabolism
• Resting and action potentials in neurones
• The structure of the liver in its role in detoxification
• Ultrafiltration, selective reabsorption and the control of water reabsorption in the kidneys
• Cyclic and non-cyclic photophosphorylation and the Calvin cycle in photosynthesis
• Glycolysis, the link reaction, Krebs cycle and oxidative phosphorylation in respiration

Unit 5 F215 · Control, Genomes and Environment

• Transcription and translation of protein synthesis
• The roles of the repressor protein, the operator and the promoter in the lac operon
• The importance of pairing of homologous chromosomes, crossing over and random assortment in meiosis
• How to solve genetics problems
• The importance of variation and natural selection in evolution
• Genetic engineering and the use of endonucleases, vectors and ligases
• The roles of plant growth regulators in leaf loss and in apical dominance
• The differences between innate and learned behaviour
• Examples of kineses, taxes, escape reflexes, exploratory learning, operant and classical conditioning and insight learning

Students have to be able to understand the principles, concepts and applications of the material covered in the AS units (F211 and F212) to make connections between the different areas within the subject: for example, membrane structure and nerve impulses in neurones; factors affecting enzymes and homeostatic control.

The question papers for both A2 units include both short structured questions and those that require more extended answers.

F216 (Practical skills) not covered in this course.

AS (legacy) Biology units may be available on request.