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Biological molecules

Identify the chemical elements that constitute carbohydrates, fats, and proteins.

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CambridgeIGCSECombined ScienceBiological molecules

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Biological molecules outcomes3 objectives

Identify the chemical elements that constitute carbohydrates, fats, and proteins.
Recognize that large molecules are formed from smaller ones, specifically: (a) starch, glycogen, and cellulose are derived from glucose; (b) proteins are constructed from amino acids; (c) fats and oils are created from fatty acids and glycerol.
Explain how to conduct tests for: (a) starch using iodine solution, (b) reducing sugars using Benedict’s solution, (c) proteins using the biuret test, and (d) fats and oils using the ethanol emulsion test.

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