Q110 / 120 · NEET 2012 (Mains) · Zoology
Identify the molecules (a) and (b) shown below and select the right option giving their source and use
I. 
II.
$\begin{array}{|l|l|l|l|}
\hline & \text{Molecule} & \text{Source} & \text{Use} \\
\hline \text{(a)} & \text{I. Cocaine} & \text{Erythroxylum coca} & \begin{array}{l}
\text{Accelerates the} \\
\text{transport dopamine}
\end{array} \\
\hline \text{(b)} & \text{II. Heroin} & \text{Cannabis sativa} & \begin{array}{l}
\text{Depressant and} \\
\text{slows down body functions}
\end{array} \\
\hline \text{(c)} & \text{II. Cannabinoid} & \text{Atropa belladona} & \text{Produces hallucinations} \\
\hline \text{(d)} & \text{I. Morphine} & \text{Papaver somniferum} & \text{Sedative and pain killer} \\
\hline
\end{array}$
II.
$\begin{array}{|l|l|l|l|} \hline & \text{Molecule} & \text{Source} & \text{Use} \\ \hline \text{(a)} & \text{I. Cocaine} & \text{Erythroxylum coca} & \begin{array}{l} \text{Accelerates the} \\ \text{transport dopamine} \end{array} \\ \hline \text{(b)} & \text{II. Heroin} & \text{Cannabis sativa} & \begin{array}{l} \text{Depressant and} \\ \text{slows down body functions} \end{array} \\ \hline \text{(c)} & \text{II. Cannabinoid} & \text{Atropa belladona} & \text{Produces hallucinations} \\ \hline \text{(d)} & \text{I. Morphine} & \text{Papaver somniferum} & \text{Sedative and pain killer} \\ \hline \end{array}$
- Correct answerA(a)
- B(b)
- C(c)
- D(d)
Solution
Cocaine $\left(\mathrm{C}_{17}, \mathrm{H}_{21}, \mathrm{NO}_4\right)$ is natural alkaloid obtained from leaves of coca. (Erythroxylon coca). It is powerful CNS stimulant which induce a sense of well being, pleasure and delays fatigue.
Morphine $\left(\mathrm{C}_{17} \mathrm{H}_{19} \mathrm{O}_3 \mathrm{~N}\right)$ is extracted from Papaver somniferum and relieve pain.
Heroin $\left[\mathrm{C}_{17} \mathrm{H}_{17}\left(\mathrm{OC}_2 \mathrm{H}_3 \mathrm{O}\right)_2 \mathrm{ON}\right]$ is semi-synthetic opiate. It is about three times more potent than morphine.
Hence, the correct answer is option: 'A'.