biology revision AS topic outline mod1

Biology Revision: AS topic outlines for Mr Jenkins
MODULE 1

MODULE BYB1 - Core Principles

Section	Time
10.4 – organisms exchange materials with their environment.	Approx. 6 lessons

Learning Objectives

As the size of the organism increases, its SA : Volume ratio decreases.
To efficiently exchange materials large animals develop systems to facilitate exchange
To state the structure, location and adaptation to function of exchange surfaces in 1) mammals, 2) bony fish & 3) dicotyledonous plant leaves.
To recall the ventilation mechanisms for each of the above, so that a concentration gradient is maintained.

Core Reading
Collins AS Pages 40-50
EXTENSION – Clegg Pages 207-222

Other references
Biofact sheets 26 & 81

Assessments

MODULE BYB1 - Core Principles

Section	Time
10.5 – Enzymes see 10.1 – proteins for background	Approx. 5 ½

Learning Objectives

Enzymes are biological catalysts that lower the activation energy for a reaction.
Enzymes work by forming an enzyme-substrate complex.
Properties of enzymes in relation to their tertiary structure – affects of 1) pH, 2) substrate concentration, 3) competitive inhibitors & 4) non-competitive inhibitors.

Core Reading
Collins AS Pages 54-64
EXTENSION – Clegg Pages 76-89

Other references
Biofact sheet 43.

Assessments

MODULE BYB1 - Core Principles

Section	Time
10.6– Digestion see 10.3 plasma membrane for background	Approx. 7

Learning Objectives

How saprophytic fungus feed.
Use of starch-agar plates for carbohydrase assays.
Structure / function of gut wall from the oesophagus through to the ileum.
The sites of production of digestive enzymes and associated secretions.
Absorption of food by the ileum – related to diffusion, facilitated diffusion and active transport.

Core Reading
Collins AS Pages 74-85
EXTENSION – Clegg Pages 164, 144-160

Other references
Biofact sheet 24.

Assessments


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