A Level Notes
AQA AS Biology Unit 1
The Cell Membrane
Movement across Cell Membranes
The Gas Exchange System
Coronary Heart Disease
The Digestive System
Lifestyle and Disease
Defence against Disease
1 – Mathematical Requirements
2– The Unit 1 Exam
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Neil C Millar (email@example.com)
Head of Biology, Heckmondwike Grammar School
High Street, Heckmondwike, WF16 0AH
HGS Biology A-level notes
AS Biology Unit 1
Biology Unit 1 Specification
Biological molecules such as carbohydrates and proteins are often polymers and are based on a small number of chemical elements.
• Proteins have a variety of functions within all living organisms. The general structure of an amino acid.
Condensation and the formation of peptide bonds linking together amino acids to form polypeptides.
The relationship between primary, secondary, tertiary and quaternary structure, and protein function. • Monosaccharides are the basic molecular units
(monomers) of which carbohydrates are composed.
The structure of α-glucose and the linking of αglucose by glycosidic bonds formed by condensation to form maltose and starch. Sucrose is a disaccharide formed by condensation of glucose and fructose. Lactose is a disaccharide