Read the following passage carefully and answer the given questions.
The B-lymphocytes produce an army of proteins in response to pathogens. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection. Symptoms of allergic reactions include sneezing, watery eyes, running nose and difficulty in breathing. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Lymphoid organs are the organs where origin and/or maturation and proliferation of lymphocytes occur. The primary lymphoid organs are bone marrow and thymus. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer’s patches of small intestine and appendix. Heroin commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine, which is extracted from the latex of poppy plant Papaver somniferum.
Heroin, commonly called smack and chemically is -
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Diacetylmorphine
The passage says that heroin, commonly called smack, is chemically diacetylmorphine. It is a white, odourless, bitter crystalline compound made by acetylation of morphine, which comes from the latex of the poppy plant Papaver somniferum. Heroin is an opioid; it acts as a depressant and slows down body functions.
Option (1) Acetylcocaine — Incorrect. Heroin is made from morphine, not cocaine. Cocaine is a different drug, obtained from the coca plant Erythroxylum coca.
Option (2) Diacetylmorphine — Correct. Heroin, commonly called smack, is chemically diacetylmorphine, a white, odourless, bitter crystalline compound. It is obtained by acetylation of morphine, extracted from the latex of the poppy plant.
Option (3) Benzodiazepines — Incorrect. Benzodiazepines are a group of medicines used to treat anxiety and sleeplessness, not heroin.
Option (4) Morphine — Incorrect. Morphine is the starting material. Heroin is made from it by acetylation, so the two are not the same compound.
Note 1: The passage is taken from NCERT. NTA has put lines of the NCERT text together to make it. Most CUET (UG) questions come straight from NCERT, so study the book line by line, including figures and their titles.
Note 2: A similar question was also asked in CUET (UG) 2025 on 29-05-2025 (Slot 1).