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Cells as the basic units of living organisms

Biology12 questions

12 past-paper questions on Cells as the basic units of living organisms

  • 9700/23 · October/November 20246 marks

    Fig. 2.2 shows three types of specialised cell that develop from Lgr5+ stem cells in the small intestine. The structural features…

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  • 9700/22 · October/November 20245 marks

    P. jirovecii produces an enzyme known as 1,3-β-D-glucan synthase. The enzyme catalyses the synthesis of 1,3-β-D-glucan. The…

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  • 9700/23 · October/November 20244 marks

    A student constructed a table to compare the structural features of a plant cell, a prokaryotic cell and a virus. Complete Table…

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  • 9700/42 · May/June 20254 marks

    Describe the structure of guard cells.

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  • 9700/22 · May/June 20253 marks

    On Fig. 1.1, name cell structures X, Y and Z.

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  • 9700/22 · October/November 20243 marks

    With reference to Fig 4.1, explain why GMP cells, which are progenitor cells, cannot be described as haematopoietic stem cells…

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  • 9700/23 · May/June 20253 marks

    S. epidermidis and S. aureus are prokaryotes. Table 3.1 shows some cell features that could apply to typical prokaryotic cells or…

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  • 9700/22 · May/June 20243 marks

    Complete Table 2.1 to name the cell structures that match the functions stated. Do not use abbreviations.

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  • 9700/22 · October/November 20243 marks

    Scientists have identified other features of the cell structure of P. jirovecii. Some of these are listed in Table 2.1. Complete…

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  • 9700/23 · May/June 20253 marks

    Suggest and explain how the protease produced by S. epidermidis cells prevents the growth of an S. aureus population on human…

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  • 9700/22 · May/June 20243 marks

    Compare lysozyme and penicillin to show the similarities and differences between these two antibacterial agents.

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  • 9700/23 · May/June 20252 marks

    Name the cells labelled A and B in Fig. 1.1.

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