Oxygen made in a mesophyll cell during photosynthesis leaves the plant. Which route does most of this oxygen take?
Into the xylem in the veins, then out of the root hairs into the soil
Into the phloem in the veins, then out of the leaf through the stomata
Out of the chloroplast, then out of the leaf through the stomata
Out of the chloroplast, then out through the waxy cuticle of the leaf
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.