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6.2 Variation and evolution

6.2 Variation and evolution

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Question 25
H

Four stages of genetic engineering are listed in an incorrect order.

  • P: Use the vector to transfer the required gene into a plant cell.
  • Q: Use enzymes to isolate the required gene from donor DNA.
  • R: Grow the modified cell into a plant with the desired characteristic.
  • S: Insert the required gene into a suitable vector.

Which sequence is correct, and which description identifies the vector's role?

[1]
A

Q→P→S→RQ \rightarrow P \rightarrow S \rightarrow RQ→P→S→R ; the vector carries the gene into the recipient cell.

B

Q→S→P→RQ \rightarrow S \rightarrow P \rightarrow RQ→S→P→R ; the vector carries the gene into the recipient cell.

C

Q→S→P→RQ \rightarrow S \rightarrow P \rightarrow RQ→S→P→R ; the vector cuts the gene out of the donor chromosome.

D

Q→P→S→RQ \rightarrow P \rightarrow S \rightarrow RQ→P→S→R ; the vector cuts the gene out of the donor chromosome.

Markscheme

6.2 Variation and evolution Questions

  1. GCSE
  2. /Biology
  3. /6.2 Variation and evolution

44 exam-style questions on AQA GCSE Biology 6.2 Variation and evolution, covering 6.2.1 Variation, 6.2.2 Evolution, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, and 6.2.5 Cloning. Each one has a worked solution and a mark scheme showing where the marks go.

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