Essential Idea:
Compounds of carbon, hydrogen and oxygen
are used to supply and store energy
Understandings:
- Monosaccharide monomers are linked together by condensation reactions to form disaccharides and polysaccharide polymers
- Fatty acids can be saturated, monounsaturated or polyunsaturated
- Unsaturated fatty acids can be cis or trans isomers
- Triglycerides are formed by condensation from three fatty acids and one glycerol
Applications:
- Structure and function of cellulose and starch in plants and glycogen in humans
- Scientific evidence for health risks of trans fats and saturated fatty acids
- Lipids are more suitable for long-term energy storage in humans than carbohydrates
- Evaluation of evidence and the methods used to obtain the evidence for health claims made about lipids
Skills:
- Use of molecular visualisation software to compare cellulose, starch and glycogen
- Determination of body mass index by calculation or use of a nomogram