This item concerns biological molecules. Select words or phrases from the list to complete the sentences. Each word or phrase can be used once, more than once, or not used at all.
Word bank: calcium, carbon, carbon dioxide, carbohydrate, cellulose, chloroplasts, fat, glycerol, glycogen, iron, methane, nitrogen, oxygen, protein, starch.
(main)[7]
Fats consist only of the elements [BLANK], hydrogen and [BLANK]. Every protein contains these three elements and the element [BLANK]. Glucose is a type of [BLANK]. Animals store surplus glucose as [BLANK] in the liver. Plants keep excess glucose as [BLANK]. Plants also change glucose into [BLANK], which is used to build cell walls.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “the element carbon” …