Independent final check
Explain without the key
explain
Final check
explain: give reasons and connect them to evidence.
Egg white is mostly water, but it contains protein. Cooking oil is almost all fat. Explain which of the two contains nitrogen, and name the smaller molecules that the protein and the fat are built from.
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Scope and sources
Cambridge IGCSE Biology 0610 · 2026–2028 v3 · Original learning materials.
The elements in carbohydrates, fats and proteins (4.1.1); starch, glycogen and cellulose from glucose, proteins from amino acids, fats and oils from fatty acids and glycerol (4.1.2); the iodine, Benedict's, biuret, ethanol emulsion and DCPIP tests (4.1.3) through the food-tests practical; the structure of DNA (Supplement 4.1.4) in the reading and practice. Colours and drop counts in the experiment come from a teaching model.
Apparatus, amounts and times in the experiment are illustrative. Real practical work follows a teacher-approved safety method.
Official Cambridge syllabus