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

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Question 38
H

A student investigates the effect of substrate concentration on the rate of an enzyme-controlled reaction.

The investigation is carried out at 37 ∘C37\ ^\circ\text{C}37 ∘C, the optimum temperature of the enzyme.

The table shows the results.

Table

Substrate concentration in %\%%Rate of reaction in arbitrary units
0.58
1.015
2.024
3.025
4.025

Which change would increase the rate of reaction at a substrate concentration of 4.0%?

[1]
A

Adding more substrate to the mixture

B

Adding more water to the mixture

C

Adding more enzyme to the mixture

D

Cooling the mixture to 20 ∘C20\ ^\circ\text{C}20 ∘C

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)?

184 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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