Class 12 Chemistry MCQ – Drugs and their Classification

This set of Class 12 Chemistry Chapter 16 Multiple Choice Questions & Answers (MCQs) focuses on “Drugs and their Classification”.

1. A chemical compound that affects human metabolism and provides cure from diseases is called ______
a) poison
b) medicine
c) enzyme
d) hormone
View Answer

Answer: b
Explanation: The chemical compounds which interact with specific targets and initiate a biological response in the body are called drugs. When the response is therapeutic and useful, they are called medicines and when it is harmful, they are called poisons.

2. Which of the following is not a classification of drugs?
a) Based on size
b) Based on chemical structure
c) Based on drug action
d) Based on target
View Answer

Answer: a
Explanation: Drugs are mainly classified on the basis of four criteria, namely pharmacological effect, drug action, chemical structure and molecular targets in the body.

3. The classification of drugs based on ______ is the most useful one for medicinal chemists.
a) pharmacological effect
b) drug action
c) chemical structure
d) molecular targets
View Answer

Answer: d
Explanation: Medicinal chemists are interested in the location at which a particular drug will create action and assign specific drugs to people based on the requirements. This also involves the mechanism of drug action on target based on structure.

4. Identify the compound which does not act as a target for drug action in the human body?
a) RNA
b) DNA
c) Vitamin C
d) Protein
View Answer

Answer: c
Explanation: The usual macromolecular targets of drugs in the body are carbohydrates, lipids, proteins and nucleic acids. Since vitamins are not produced by the body, they can be controlled without the use of drugs.

5. Which of the following drugs is not classified in the criteria based on the pharmacological effect?
a) Antihistamines
b) Antiseptics
c) Analgesics
d) Antipyretics
View Answer

Answer: a
Explanation: Pharmacological effects of drugs provides a wide range of drugs that have a same effect on a specific type of problem. Analgesics have pain killing effect, antiseptics prevent the growth of microbes and antipyretics help in lowering body temperature during fever.

Sanfoundry Global Education & Learning Series – Chemistry – Class 12.

To practice all chapters and topics of class 12 Chemistry, here is complete set of 1000+ Multiple Choice Questions and Answers.


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