O-LevelBiologyPlant Nutrition5090/22 · May/June 2022 · Q710 Marks
The diagram shows a cross-section through a seed before germination and the same seed after it has become a seedling. [Figure 7.0 showing a seed before germination and a seedling with roots, stem, leaves (L), and cotyledons, with an arrow indicating "germination" and "soil surface" label.] (a) Outline the importance of the following in seed germination: enzymes cell division [7] (b) Explain why it is important that the structures labelled L in the seedling are above the soil surface. [3]
- (a)Outline the importance of the following in seed germination: enzymes cell division[7]
- (b)Explain why it is important that the structures labelled L in the seedling are above the soil surface.[3]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2022). The mark or mark type is shown in brackets.
- [1] named enzyme ;
- [1] substrate named for enzyme that has been named in marking point 1;
- [1] glucose / amino acids / fatty acids and glycerol + produced ;
- [1] respiration + energy released ;
- [1] enzymes used in respiration ;
- [1] protein synthesis ;
- [1] mitosis ;
- [1] production of genetically + identical cells OR clones ;
- [1] growth / new protoplasm / new organelles ;
- [1] radicle + plumule ;
- [1] light;
- [1] chloroplasts / chlorophyll ;
- [1] photosynthesis ;
- [1] produce + carbohydrate / glucose / starch ;
Write your answer and get it marked
On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.
Sign up free →