NEET-PG 2014 — Forensic Medicine

Q: What is the active ingredient of the marking nut (Semecarpus anacardium)?

Semecarpol. ***Semecarpol*** - **Semecarpol** is a **phenolic compound** derived from the fruit of the marking nut tree (*Semecarpus anacardium*), which is responsible for its toxic and medicinal properties. - It causes **irritation**, **blistering**, and **allergic contact dermatitis** upon contact with skin. *Ricin* - **Ricin** is a **toxic protein** found in castor beans (*Ricinus communis*), not the marking nut. - It is a **potent ribosome-inactivating protein** that can be lethal if ingested, inhaled, or injected. *Croton* - **Croton** refers to a genus of plants (*Croton*) from which various compounds, including **phorbol esters**, can be extracted. - These compounds are potent **tumor promoters** and vesicants, but they are not the active ingredient of the marking nut. *Abrin* - **Abrin** is a **highly toxic protein** found in the seeds of the jequirity bean (*Abrus precatorius*), which is distinct from the marking nut. - Like ricin, abrin is a **ribosome-inactivating protein** and is extremely toxic upon exposure.

61 Questions — Page 7 of 7

All Subjects Biochemistry (1)Dental (1)ENT (1)Forensic Medicine (61)Microbiology (1)Obstetrics and Gynecology (1)Pharmacology (1)Psychiatry (1)

Q61

What is the active ingredient of the marking nut (Semecarpus anacardium)?

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