Azadirachtin Classification: Understanding Triterpenes
The question asks to identify the chemical class of Azadirachtin, a compound derived from the neem tree (Azadirachta indica). Azadirachtin is a complex organic molecule known for its potent insecticidal and medicinal properties.
Source and Significance of Azadirachtin
Azadirachtin is a naturally occurring substance extracted from the seeds of the neem tree. It's famous for its role as a biological pesticide, acting as an antifeedant, repellent, and growth regulator for many insect species. Its isolation and identification have been crucial in developing natural alternatives to synthetic pesticides.
Chemical Structure and Classification
Chemically, Azadirachtin belongs to the class of compounds known as triterpenes. Triterpenes are a large and diverse group of organic compounds derived from squalene. They are synthesized naturally in plants and fungi through the mevalonate pathway or the methylerythritol phosphate pathway.
Azadirachtin specifically is a highly oxygenated tetranortriterpenoid limonoid. Limonoids themselves are a subclass of triterpenes derived from the characteristic lanostane skeleton.
Comparison with Other Options
To understand why Azadirachtin is classified as a triterpene, let's briefly look at the other options:
- Phenols: These are organic compounds containing a hydroxyl ($-OH$) group attached directly to an aromatic hydrocarbon group. Examples include salicylic acid and tannins. Azadirachtin does not fit this basic structure.
- Flavonoids: This is a large group of plant secondary metabolites composed of a 15-carbon skeleton, typically arranged as two phenyl rings and a heterocyclic ring. Examples include quercetin and anthocyanins. Azadirachtin's structure is distinct from flavonoids.
- Alkaloids: These are naturally occurring chemical compounds containing basic nitrogen atoms. They often have significant physiological effects on humans and animals. Examples include caffeine, nicotine, and morphine. Azadirachtin is not an alkaloid.
Conclusion on Azadirachtin's Class
Based on its chemical structure and biosynthetic origin, Azadirachtin is definitively classified as a triterpene, specifically a limonoid derivative.
Important Questions from Miscellaneous
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
A mass is attached to a spring that hangs vertically. The extension produced in the spring is 6 cm on Earth. The acceleration due to gravity on the surface of the Moon is one-sixth of its value on the surface of the Earth. The extension of the spring on the Moon would be:
Directions: Each item in this section consists of a sentence with an underlined word followed by four words (a), (b), (c), and (d). Select the option that is opposite in meaning to the underlined word and mark your response in your Answer Sheet accordingly.
The deluge affected the population.The major source of vitamins and minerals for vegetarians is
Which of the following statements about the Deccan Riots Commission is/are correct?
1. The Commission did not hold enquiries in the districts which were not affected.
2. The Commission did record the statements of ryots, sahukars and eye-witnesses.
Select the correct answer using the code given below:
