How many Factors that affect enzyme action questions are there for 9700?

This page collects 9 recent Cambridge Biology (9700) past-paper questions tagged to Factors that affect enzyme action. Each links straight to instant marking against the official 9700 scheme.

How are Factors that affect enzyme action answers marked?

Type or photograph your working and MarkScheme scores it against the real 9700 mark scheme for this topic — method, accuracy and any band descriptors — so you see exactly where the marks are.

Where can I learn Factors that affect enzyme action first?

Start with the free Biology lesson on Factors that affect enzyme action, then come back and drill past-paper questions under timed conditions.

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9700 · topic questions

Factors that affect enzyme action

Biology9 questions

9 past-paper questions on Factors that affect enzyme action

9700/22 · October/November 20245 marks
P. jirovecii produces an enzyme known as 1,3-β-D-glucan synthase. The enzyme catalyses the synthesis of 1,3-β-D-glucan. The…
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9700/23 · May/June 20254 marks
With reference to Fig. 4.1, describe the differences in the results at pH 4.5 and pH 5.9 and suggest explanations for the…
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9700/23 · October/November 20244 marks
Biofuels contain alcohols that are produced by the fermentation of sugars derived from crop waste. This waste contains cellulose…
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9700/42 · May/June 20254 marks
With reference to Fig. 8.2: • • explain the curve between A and B explain why the curve levels off after C.
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9700/42 · October/November 20243 marks
Explain the results shown in Fig. 6.1.
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9700/22 · October/November 20242 marks
In the experiment used to obtain the results shown in Fig. 5.1, the temperature and pH were standardised. Explain what the…
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9700/23 · May/June 20252 marks
Determine the Michaelis–Menten constant, Km, for α-galactosidase at pH 4.5 using the data in Fig. 4.1. State the unit for the Km…
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9700/42 · October/November 20242 marks
State two variables that need to be kept constant in this experiment.
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9700/22 · May/June 20252 marks
Inhibitors can have an effect on Vmax, the maximum rate of reaction, and Km, the Michaelis–Menten constant, of HRP. Fig. 6.2…
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Question stems are shortened previews. Open a question to attempt the full version and have it marked.

Worked example

What a lost mark actually looks like

This answer reaches the right coordinates and still drops a mark — the conclusion is stated, but never justified. Examiners pay for the reasoning, not the answer.

MARKED

80%

Strong

M1dy/dx = 3x^2 - 12x + 9M1 earned
M1(x - 1) $(x - 3) = 0$ M1 earned
A1 $x = 1$ or $x = 3$ A1 earned
B1(1, 5) is a maximum and (3, 1) is a minimumB1 not earned

B1 — withheld
You stated the nature of each point correctly, but stated it without justification. This mark needs the reasoning shown — either evaluate the second derivative (d²y/dx² = 6x − 12, giving −6 at $x = 1$ and +6 at $x = 3$ ) or show a sign change of dy/dx either side of each point. An unsupported assertion earns nothing here even when the conclusion is right.

Factors that affect enzyme action (9700) past-paper questions — marked instantly

These are real Cambridge Biology past-paper questions on Factors that affect enzyme action. Open one, attempt it, then upload your working — MarkScheme grades it against the official 9700 mark scheme so you see exactly where the marks are won and lost on this topic.

Mark your answer →Learn Factors that affect enzyme action 9700 grade boundaries

Frequently asked questions

How many Factors that affect enzyme action questions are there for 9700?: This page collects 9 recent Cambridge Biology (9700) past-paper questions tagged to Factors that affect enzyme action. Each links straight to instant marking against the official 9700 scheme.
How are Factors that affect enzyme action answers marked?: Type or photograph your working and MarkScheme scores it against the real 9700 mark scheme for this topic — method, accuracy and any band descriptors — so you see exactly where the marks are.
Where can I learn Factors that affect enzyme action first?: Start with the free Biology lesson on Factors that affect enzyme action, then come back and drill past-paper questions under timed conditions.