Opiates have the following general structure. The correct representation of $R^1$ and $R^2$ for codeine $(X)$ and heroin $(Y)$ is
- A
- B
- C
- D
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The artificial sweetener which is stable under cold conditions only is
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View SolutionWhich of the following statements are correct?
$(i)$ Drugs that mimic natural messenger by switching on the receptor are called agonists.
$(ii)$ Shape of the receptor does not change after attachment of chemical messenger.
$(iii)$ $A$ cationic detergent is formed when stearic acid reacts with polyethylene glycol.
$(iv)$ Seldane is an antihistamine.
$(i)$ Drugs that mimic natural messenger by switching on the receptor are called agonists.
$(ii)$ Shape of the receptor does not change after attachment of chemical messenger.
$(iii)$ $A$ cationic detergent is formed when stearic acid reacts with polyethylene glycol.
$(iv)$ Seldane is an antihistamine.
Which of the following is a bactericidal antibiotic?
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