Q. The diagram given below shows how mutations in certain genes (X and ) can lead to cancer. Use the diagram to answer the question that follows
image
What do and represent?
X Y
(1) Mutagen Carcinogens
(2) Proto-oncogenes Tumor suppressor gene
(3) Carcinogen Proto-oncogenes
(4) Proto-oncogenes Carcinogens

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Solution:

Correct answer is (b) 2