जीव विज्ञान – Biology MCQ
जीव विज्ञान – कृषि/वन प्रवेश
Biology · Agriculture, Veterinary & Forestry Entrance · ८४० प्रश्न
८४० प्रश्न उपलब्ध। मोड छान्नुहोस्:
जीव विज्ञान: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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Heroin, commonly called 'smack', is chemically:
सही उत्तर: ख) Diacetylmorphine
Heroin is produced by acetylation of morphine, obtained from the latex of the poppy Papaver somniferum.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The causative agent of tuberculosis was discovered in 1882 by:
सही उत्तर: ग) Robert Koch
Robert Koch identified Mycobacterium tuberculosis in 1882.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Amoebiasis (amoebic dysentery) is caused by:
सही उत्तर: ख) Entamoeba histolytica
Entamoeba histolytica lives in the large intestine; houseflies can carry its cysts to food.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Ringworm, a common skin infection in humans, is caused by:
सही उत्तर: क) Fungi such as Trichophyton and Microsporum
Despite its name, ringworm is a fungal infection caused by dermatophytes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Sperm are produced in which part of the human testis?
सही उत्तर: क) Seminiferous tubules
Spermatogenesis occurs in the seminiferous tubules; sperm mature and are stored in the epididymis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Myopia (short-sightedness) can be corrected by using spectacles with:
सही उत्तर: ग) Concave (diverging) lenses
In myopia the image forms in front of the retina; a concave lens diverges rays so the image falls on the retina.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Eustachian tube connects the:
सही उत्तर: ग) Middle ear with the pharynx
The Eustachian (auditory) tube equalises air pressure on both sides of the eardrum.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Insulin was discovered in 1921 by:
सही उत्तर: क) Frederick Banting and Charles Best
Banting and Best isolated insulin from the pancreas in 1921 at Toronto.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Cushing's syndrome is caused by excess secretion of:
सही उत्तर: क) Cortisol
Cushing's syndrome results from prolonged high levels of glucocorticoids such as cortisol.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Simple goitre, an enlargement of the thyroid gland, is commonly caused by deficiency of:
सही उत्तर: ग) Iodine
Lack of iodine reduces thyroxine synthesis, and the thyroid enlarges under TSH stimulation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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