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5.2 Plant and body defences

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Question 33
H

The table shows observations from two patients. All other defences are working normally.

Table

PatientAirway mucusMovement of cilia
Pnormalgreatly reduced
Qgreatly reducednormal

Which comparison explains why both patients may have an increased risk of airway infection?

[1]
A

P removes trapped pathogens less effectively; Q traps pathogens less effectively

B

P traps pathogens less effectively; Q removes trapped pathogens less effectively

C

P destroys bacterial cell walls less effectively; Q produces less stomach acid

D

P produces less stomach acid; Q destroys bacterial cell walls less effectively

Markscheme

5.2 Plant and body defences Questions

  1. GCSE
  2. /Biology
  3. /5.2 Plant and body defences

45 exam-style questions on Edexcel GCSE Biology 5.2 Plant and body defences, covering 5.2.1 Physical plant defences, 5.2.2 Chemical plant defences, 5.2.3 Detecting plant diseases, and 5.2.4 Human physical and chemical defences. Each one has a worked solution and a mark scheme showing where the marks go.

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