Biology International Advanced Subsidiary
Oxford University (OX)
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Biology International Advanced Subsidiary / Advanced Level UNIT 4: Energy, Environment, Microbiology and Immunity Actual 2024 Exams
- Exam (elaborations) • 28 pages • 2024
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1 Skin flora provide a barrier, protecting the body from infection by bacteria.
(a) Which of the following also act as barriers, protecting the body from infection
by bacteria?
(1)
A antigens and stomach acid
B antigens and interferon
C interferon and skin
D skin and stomach acid
(b) The diagrams show the effects of different methods of washing hands on
skin flora.
The dark areas show the presence of microorganisms and the light areas show
clean areas
Exam (elaborations)
Biology International Advanced Subsidiary / Advanced Level UNIT 4: Energy, Environment, Microbiology and Immunity Actual 2024 Exams
Last document update:
ago
1 Skin flora provide a barrier, protecting the body from infection by bacteria. (a) Which of the following also act as barriers, protecting the body from infection by bacteria? (1) A antigens and stomach acid B antigens and interferon C interferon and skin D skin and stomach acid (b) The diagrams show the effects of different methods of washing hands on skin flora. The dark areas show the presence of microorganisms and the light areas show clean areas
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