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

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Question 18

A laboratory technician investigates how temperature affects the rate of a reaction using catalase and hydrogen peroxide. At each temperature, the technician carries out three trials and records the volume of oxygen produced in 60 s.

Which instruction should be included so that temperature is the only factor affecting the reaction rate?

[1]
A

Start the 60 s timing when oxygen is first produced

B

Use the fastest of the three trials at each temperature

C

Increase the volume of catalase as the temperature increases

D

Use hydrogen peroxide of the same concentration in every trial

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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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