Onion (Allium cepa): The characteristic volatile sulfur compound responsible for its pungent odor and tear-inducing sensation is Allyl propyl disulphide (along with lachrymatory factor syn-propanethial-S-oxide).
Garlic (Allium sativum): Pungency is caused by Diallyl disulphide (formed via alliin and allicin breakdown).
Mustard: Pungency is caused by allyl isothiocyanate.
Correct Option: Option 4 (Onion).
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Q.2
Vegetable Science- ICAR JRF/SRF 2024 (Q.74)
MCQ (Single Correct)+4−1
How much onion seed is required to raise enough sets to plant one hectare area of kharif onion?
Growing onion (Allium cepa) during the Kharif rainy season in Maharashtra and Karnataka frequently uses small dried onion bulblets known as sets ($1.5 - 2.0\text{ cm}$ diameter).
To produce enough sets to plant one hectare of Kharif onion field, approximately $5 - 7.5\text{ kg}$ of true onion seed is sown densely in raised nursery beds during January–February, harvested as sets in April–May, cured, and transplanted in July–August.
Correct Option: Option 2 (5-7.5kg).
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