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

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Question 22
H

Some bacteria live in hot springs, where the water temperature is about 70 ∘C70\ ^\circ\text{C}70 ∘C.

Scientists compared an enzyme from these bacteria with the same type of enzyme from humans.

The Table shows the rate of reaction of each enzyme at different temperatures.

Table

Temperature in ∘C^\circ\text{C}∘CRate with human enzyme in arbitrary unitsRate with bacterial enzyme in arbitrary units
20123
30246
403811
502019
60230
70044
80026
9004

Use the data and your knowledge of how enzymes work to explain the results.

[6]
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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