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NCERT Exemplar · Q48

Q.The outline structure of a drug is given below.
a. Which group of drugs does this represent?
b. What are the modes of consumption of these drugs?
c. Name the organ of the body which is affected by consumption of these drugs.

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Assuming the outline structure shown is that of morphine (or a closely related opioid such as heroin), it belongs to the opioid group of drugs — consumed by snorting, smoking, or injection — and it primarily affects the brain, acting on specific opioid receptors in the central nervous system.

NCERT Exemplar questions of this "outline structure" format are built around a small set of well-known drug skeletons the chapter discusses, and the figure referenced here is the standard morphine-type opioid backbone used throughout this section of the chapter (the same family as heroin, which is chemically diacetylmorphine — morphine with two acetyl groups added). Working through the three parts in order:

a. Which group of drugs does this represent?

The structure represents the opioid (narcotic analgesic) group — compounds derived from the opium poppy (Papaver somniferum) or their chemically modified derivatives. Morphine itself is extracted directly from opium latex; heroin is produced by acetylating morphine, which makes it more lipid-soluble and faster-acting on the brain.

b. What are the modes of consumption of these drugs?

Opioids in this group are most commonly abused by:

  • Injection (intravenously, for a rapid and intense effect — and a major route by which HIV and hepatitis B/C spread through shared needles),
  • Snorting (inhaling the powdered drug through the nose), and
  • Smoking (heating and inhaling the vapour).
Important

The injection route carries an additional, serious risk beyond the drug's own pharmacology: sharing needles between users is a well-documented transmission route for HIV and hepatitis, compounding the direct harm of the drug itself.

c. Name the organ of the body which is affected by consumption of these drugs. …

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