A plant is kept in complete darkness for two days. The mass of starch in its leaves falls. Which statement explains this?
Starch is converted into nitrate ions, which are used to make new amino acids
Starch is converted into cellulose, which is used to build new plant cell walls
Starch is converted into oxygen, which is used by the plant cells for respiration
Starch is converted into glucose, which is used by the plant cells for respiration
54 exam-style questions on AQA GCSE Biology 4.1 Photosynthesis, covering 4.1.1 Photosynthetic reaction, 4.1.2 Rate of photosynthesis, and 4.1.3 Uses of glucose from photosynthesis. Each one has a worked solution and a mark scheme showing where the marks go.