Home / iGCSE Biology (0610)-21.3 Genetic modification – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-21.3 Genetic modification – iGCSE Style Questions Paper 1

Question

A gene is added to the genetic material of an avocado plant. This gene makes the avocado fruits stay ripe for longer before they start to decompose. What is this process an example of?

1 adaptation
2 genetic modification
3 selective breeding

A) 1, 2 and 3
B) 1 and 3 only
C) 2 only
D) 3 only

▶️ Answer/Explanation
Solution

Ans: C

This process is genetic modification (2) because a foreign gene is directly inserted into the avocado’s DNA to alter its characteristics.

It is not adaptation (1), which occurs naturally over generations, nor selective breeding (3), which involves choosing parents with desired traits. Thus, only option C (2 only) is correct.

Question

Which row shows uses of genetic modification?

Biotechnology diagram

▶️ Answer/Explanation
Solution

Ans: D

Genetic modification involves directly altering an organism’s DNA. The correct pair is:

  • Producing insulin – Genetically modified bacteria produce human insulin
  • Creating pest-resistant crops – Genes from bacteria are inserted into plants

Other options mix genetic modification with traditional methods (selective breeding, cross-pollination) which don’t involve direct DNA manipulation.

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