Question

Which of the following professionals are more likely to run the risk of a permanent change in their cell’* DNA?

1. Researchers from carbon-14 isotope

2. X-ray technician

3. Coal miner

4. Dyer and painter

Select the correct answer from the codes given below:

(a) 2 only

(b) 1, 2 and 3

(c) 1, 2 and 4

(d) 1, 3 and 4

Answer 1

The correct option is:(b) 1, 2 and 3

Explanation;

Carbon-14 is radioactive isotope of carbon, which can mutate the DNA by getting incorporated into it. X-rays are high energy and ionizing rays. These can cause mutation at genetic level though they generally damage the bio-molecules by altering their function. Coal miners have the risk to develop certain types of cancers.