(a) Put these levels of organisation in order, starting with the smallest.
organ cell organ system organelle tissue [1]
(b) Give two structures found in a palisade cell of a leaf that are not found in a human cheek cell. [2]
(c) State the function of ribosomes. [1]
- (a) organelle → cell → tissue → organ → organ system (all in correct order for the mark)(1)
- (b) any two from: cell wall; chloroplast(s); (large permanent) vacuole — first mark for one correct structure(1)
- (b) second correct structure; ignore cell membrane / nucleus / cytoplasm / mitochondria / ribosomes (found in both cells)(1)
- (c) site of protein synthesis; accept make / produce proteins / where amino acids are joined (to make proteins); reject 'make energy'(1)
- Answer: (a) organelle, cell, tissue, organ, organ system (b) two of cell wall, chloroplast, permanent vacuole (c) protein synthesis
- Examiner tip: For ribosomes write 'protein synthesis' — answers that give a function of another organelle, such as releasing energy (mitochondria), score nothing.