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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

0/41

5 · The Mitotic Cell Cycle

0/21

6 · Nucleic Acids and Protein Synthesis

0/22

7 · Transport in Plants

0/28

8 · Transport in Mammals

0/39

9 · Gas Exchange

0/13

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

0/69

19 · Genetic Technology

0/44
Quiz

3.2.4 Rate- Substrate Concentration – Exam questions

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  • Questions count: 4
  • Passing grade: B+
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1.
Rate at different substrate concentrations is shown. Why does the rate level off above 4%?
The enzyme has denatured
The substrate has become the enzyme
All active sites are occupied — the enzyme is saturated
Temperature has fallen
2.
At high substrate concentrations, rate plateaus because
the enzyme is denatured
the substrate is used up
all active sites are occupied
inhibitors form
3.
From the graph, which change would increase the rate at 8% substrate?
Dr Dabour Hub Academy - figure 1
Adding more enzyme
Adding more substrate
Lowering the temperature to 5 °C
Boiling the enzyme
4.
Adding more substrate no longer increases the reaction rate because
the enzyme has denatured
the product has become an inhibitor
all active sites are occupied
activation energy has increased
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Part of 3 · Enzymes — see every lesson and quiz in this unit.
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