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2.1 Supplying the cell

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Question 24

Aphids pierce the stem of a plant to feed on the liquid transported within the phloem vessels.

Which of the following components of phloem sap is primarily used by the aphids as a respiratory substrate to release energy?

A

Amino acids

B

Mineral ions

C

Sucrose

D

Lipids

Markscheme

2.1 Supplying the cell Questions

  1. GCSE
  2. /Biology
  3. /2.1 Supplying the cell

82 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.

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