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Course: Cambridge AS & A Level Biology 9700 ...
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Cambridge AS & A Level Biology 9700 — Revision Notes

1 · Cell Structure

0/26

2 · Biological Molecules

0/51

3 · Enzymes

0/29

4 · Cell Membranes and Transport

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7 · Transport in Plants

0/28

8 · Transport in Mammals

0/39

10-11 · Infectious Disease and Immunity

0/43

12 · Energy and Respiration

0/37

13 · Photosynthesis

0/23

14-15 · Homeostasis and Control

0/57

16 · Inherited Change

0/34

17-18 · Selection, Evolution, Classification and Conservation

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19 · Genetic Technology

0/44
Quiz

3.2.2 Rate- pH – Exam questions

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1.
Enzyme activity at different pH values is shown. Which enzyme is most likely pepsin from the stomach?
Enzyme Q
Enzyme R
Enzyme P
None
2.
The graph shows three enzymes' activity against pH. Which enzyme would work best in an acidic stomach?
Dr Dabour Hub Academy - figure 1
Amylase
Trypsin
Pepsin
All equally
3.
Lysosomal enzyme activity at two pH values is shown. What is the safety benefit of this?
The enzymes work best in cytosol
Enzymes destroy the lysosome at pH 5
Leaked enzymes are much less active in neutral cytosol, so the cell is protected
pH has no effect
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