Which of the following is not a target molecule for drug function in body?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Vitamins
Drugs act by interacting with large biomolecules of the body, called target molecules or drug targets. These are carbohydrates, lipids, proteins (enzymes and receptors) and nucleic acids. Vitamins are small molecules needed in the diet for normal growth; they are not among the drug targets.
Option (1) Carbohydrates — A drug target. Carbohydrates are one of the listed target molecules.
Option (2) Lipids — A drug target. Lipids are also target molecules.
Option (3) Vitamins — Not a drug target. Vitamins are not in the list of target molecules.
Option (4) Proteins — A drug target. Proteins (enzymes and receptors) are the most common drug targets.
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.
NCERT (Pre-rationalised edition, 2022-23):
On the Basis of Molecular Targets – “Drugs usually interact with biomolecules such as carbohydrates, lipids, proteins and nucleic acids. These are called target molecules or drug targets.”