Biology 9700 · AS & A Level · Cells as the basic units of living organisms

Cells as the basic units of living organisms — practice question

An electron micrograph of a plant cell is shown in the diagram. What substances are present in structures X, Y and Z?

  • AX: air; Y: starch; Z: DNA and RNA
  • BX: cell sap; Y: chlorophyll; Z: protein
  • CX: mineral ions; Y: starch; Z: DNA and RNA
  • DX: water; Y: mineral ions; Z: starch

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