5Dec19 FS Q18
0. Match the following classes of chemicals with their descriptions;
| (Chemical Class) | (Description) | ||
| (A) | Allergens | (i) | Chemicals that alter or damage the genetic material (DNA) cells |
| (B) | Mutageus | (ii) | Substances that activate the immune system |
| (C) | Carcinogens | (iii) | Chemicals that specifically cause abnormalities during embryouics growth and development. |
| (D) | Teratogens | (iv) | Substances that cause invasive out control cell growth resulting in malignant tumors. |
- Option : C
- Explanation : An allergen is a usually harmless substance capable of triggering a response that starts in the immune system and results in an allergic reaction. Mutagens are chemical compounds or forms of radiation that cause irreversible and heritable changes in the cellular genetic material, deoxyribonucleic acid (DNA). A carcinogen is any substance, radionuclide, or radiation that promotes carcinogenesis, the formation of cancer. Teratogen is an agent that can disturb the development of an embryo or fetus. Teratogens may cause a birth defect in the child.
