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

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Question 17

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

$Q_{10}$ is calculated using this formula:

Q_{10} = \text{rate at higher temperature} \div \text{rate at lower temperature}

An enzyme reaction has a rate of $units/min45\text{ units/min}$ at $35∘C35^\circ\text{C}$ and $units/min18\text{ units/min}$ at $25∘C25^\circ\text{C}$ .

What is the $Q_{10}$ for this enzyme?

$0.40$

$2.50$

$27$

$810$

Markscheme

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

GCSE
Biology
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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