Chemical Safety Tests

Q. Toxicity of drugs on humans can be studied by using transgenic animals by

1. Introducing a gene that shows change in physiology of organism
2. Introducing a gene that makes them more sensitive to toxic substances
3. Introducing a complementary gene into organism
4. All of the these

Q. Regarding assertion and reason, choose the correct option
Assertion [A]: For toxicity testing, transgenic animals are made to carry genes which make them more sensitive to toxic substance.
Reason [R]: Transgenic animals are exposed to toxic substances to study the effect of these toxins.

1. Both A and R are correct and R explains A
2. Both A and R are correct and R does not explain A
3. Both A and R are incorrect
4. A is correct but R is incorrect