Properties of Gas Exchange Surfaces All organisms need to exchange gases with their environment, e.g. Aerobic respiration requires oxygen and produces carbon dioxide as a waste product Photosynthes...
1.2.11 Practical: Vitamin C Content Vitamin C is found in green vegetables, fruits, and potatoes It is essential for a healthy diet The chemical name for vitamin C is ascorbic acid Ascorbic acid is...
Lipids & CVD A risk factor is any factor that increases the chance of developing a particular condition or disease An increase in a risk factor does not guarantee the development of disease, bu...
Lipids Lipids Lipids are macromolecules that contain carbon, hydrogen and oxygen atoms. Unlike carbohydrates, lipids contain a lower proportion of oxygen Lipids are non-polar and hydrophobic (insol...
Polysaccharides: Structure Starch, glycogen, and cellulose are examples of polysaccharides Polysaccharides are carbohydrate polymers; repeated chains of many monosaccharides joined by glycosidic bo...
Disaccharides: Structure Two monosaccharides can join together via condensation reactions to form disaccharides A condensation reaction is one in which two molecules join together via the formation...
The Glycosidic Bond To make monosaccharides more suitable for storage they are bonded together to form disaccharides and polysaccharides Polysaccharides are insoluble so have less influence on the ...
Monosaccharides: Structure Carbohydrates are one of the main carbon-based compounds in living organisms All molecules in this group contain C, H and O Carbon atoms are key to the structure of organ...
Energy Budgets & Diet Every cell needs a constant supply of energy to fuel metabolic processes; this energy is released during the process of respiration Organisms therefore need to take in eno...
