CAIE A Level Biology 9700 · Enzymes
A student is investigating the effect of temperature on the rate of an enzyme-catalysed reaction. The student has samples of the enzymes catalase and amylase, along with their respective substrates (hydrogen peroxide and starch). Outline a method the student could use to measure the rate of reaction, choosing one of these enzymes and explaining how the progress of the reaction would be followed.
4 marks, so the mark scheme is looking for about 4 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.