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1.1 Cell structures

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Question 21

A compost sample contains both yeast cells and bacteria. A student describes two cells from the sample.

  • Cell X has chromosomes inside a membrane-bound compartment.
  • Cell Y has a main circular loop of DNA lying free in the cytoplasm, as well as separate plasmids.

Which identification of the two cells is correct?

[1]
A

Cell X is a bacterium; cell Y is a yeast cell.

B

Cell X is a yeast cell; cell Y is a bacterium.

C

Cell X and cell Y are both yeast cells.

D

Cell X and cell Y are both bacteria.

Markscheme

1.1 Cell structures Questions

  1. GCSE
  2. /Biology
  3. /1.1 Cell structures

130 exam-style questions on OCR GCSE Biology 1.1 Cell structures, covering 1.1.1 Viewing cells with light microscopes, 1.1.2 Sub-cellular structures and functions, and 1.1.3 Electron microscopy and resolution. Each one has a worked solution and a mark scheme showing where the marks go.

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