CAIE A Level Biology 9700 · Cell structure
A student compares electron micrographs of a plant leaf cell and a bacterium, Escherichia coli. Outline the differences between the ribosomes of these two cell types, including their size, subunit composition, and cellular locations. In the plant cell, identify the compartments where 70S ribosomes are found.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.