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

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Question 56

The temperature coefficient (Q10Q_{10}Q10​) is calculated using the following formula:

Q10=rate at (T+10)∘Crate at T∘C Q_{10} = \frac{\text{rate at } (T + 10)^\circ\text{C}}{\text{rate at } T^\circ\text{C}} Q10​=rate at T∘Crate at (T+10)∘C​

During an investigation into cellular respiration in active yeast cultures, the rate of carbon dioxide release was measured at two different temperatures:

  • At 22∘C22^\circ\text{C}22∘C, the rate of carbon dioxide release was 6.5 cm3 h-1.
  • At 32∘C32^\circ\text{C}32∘C, the rate of carbon dioxide release was 16.9 cm3 h-1.

What is the Q10Q_{10}Q10​ value for this respiration process over this temperature range?

A

0.380.380.38

B

10.4010.4010.40

C

2.602.602.60

D

109.85109.85109.85

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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