JEE Main levelSingle correct optionDifficulty 2 of 3el015
Which statement is correct?
AA drug is always a mixture, while a medicine is always a single pure compound
BA drug is a substance of molecular mass above 10000 u that works by dissolving in the blood
CA drug acts only on bacteria and never on human cells
DA drug is a chemical of fairly low molecular mass that interacts with a macromolecular target in the body and produces a biological response
Answer: D
Drugs are small molecules (roughly 100 to 500 u in the standard NCERT treatment) that bind macromolecular targets such as proteins and nucleic acids. The other statements are wrong on composition, size or scope.