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2.2 The challenges of size

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Question 49

The surface area of a certain bacterial cell is 2.4 × 10-6 mm2.

The volume is 8 × 10-10 mm3.

What is the surface area to volume ratio of this bacterial cell?

A

0.003:10.003 : 10.003:1

B

0.3:10.3 : 10.3:1

C

300:1300 : 1300:1

D

3000:13000 : 13000:1

Markscheme

2.2 The challenges of size Questions

  1. GCSE
  2. /Biology
  3. /2.2 The challenges of size

114 exam-style questions on OCR GCSE Biology 2.2 The challenges of size, covering 2.2.1 Exchange surfaces and surface area : volume ratio, 2.2.2 Substances transported in organisms, 2.2.3 The human circulatory system, 2.2.4 The heart and blood vessels, 2.2.5 Red blood cells and plasma, 2.2.6 Uptake of water and mineral ions by plants, 2.2.7 Transpiration and translocation, 2.2.8 Xylem and phloem, 2.2.9 Environmental factors and water uptake, and 2.2.10 Using a potometer. Each one has a worked solution and a mark scheme showing where the marks go.

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