Biology · May / June 2025 · Paper 22 · Question 3
5090
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Staphylococcus aureus is a pathogen which infects humans. It can be destroyed by antibodies and antibiotics. The cells of this bacterium are spherical and about 1 μm in diameter. Fig. 3.1 shows a diagram of an S. aureus cell. A B capsule Fig. 3.1
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3(a)(i)[2]
3(a)(ii)[2]
3(a)(iii)[3]
3(b)(i)[1]
3(b)(ii)[2]
3(c)(i)[1]
3(c)(ii)[5]
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