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2.1 Supplying the cell

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Question 28

An adult female has:

  • 4.84.84.8 million red blood cells per microlitre of blood.
  • 4.24.24.2 litres of blood.

(1 litre=1 000 000 microlitres1\text{ litre} = 1\,000\,000\text{ microlitres}1 litre=1000000 microlitres)

Calculate how many red blood cells are in her blood. Give your answer in standard form.

[3]
Markscheme

2.1 Supplying the cell Questions

  1. GCSE
  2. /Biology
  3. /2.1 Supplying the cell

82 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.

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