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1.2 What happens in cells (and what do cells need)?

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Question 22

Q10Q_{10}Q10​ is a measure of the rate of change of a reaction when temperature is increased by 10∘C10^\circ\text{C}10∘C.

Q10Q_{10}Q10​ is calculated using this formula:

Q10=rate at higher temperaturerate at lower temperature Q_{10} = \frac{\text{rate at higher temperature}}{\text{rate at lower temperature}} Q10​=rate at lower temperaturerate at higher temperature​

An enzyme reaction has a rate of 33 units/min33\text{ units/min}33 units/min at 30∘C30^\circ\text{C}30∘C and 15 units/min15\text{ units/min}15 units/min at 20∘C20^\circ\text{C}20∘C.

What is the Q10Q_{10}Q10​ for this enzyme?

A

0.45

B

2.20

C

18

D

495

Markscheme

1.2 What happens in cells (and what do cells need)? Questions

  1. GCSE
  2. /Biology
  3. /1.2 What happens in cells (and what do cells need)?

72 exam-style questions on OCR GCSE Biology 1.2 What happens in cells (and what do cells need)?, covering 1.2.1 Structure of DNA, 1.2.2 Nucleotides and complementary bases, 1.2.3 Protein synthesis, 1.2.4 DNA structure and the proteins made, 1.2.5 Investigating enzymatic reactions, and 1.2.6 Mechanism of enzyme action. Each one has a worked solution and a mark scheme showing where the marks go.

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