जीव विज्ञान – Zoology – Zoology MCQ
जीव विज्ञान – Zoology – CEE प्रवेश
Zoology · Medical Entrance (CEE) – Physics, Chemistry, Biology & MAT · ४०८ प्रश्न
४०८ प्रश्न उपलब्ध। मोड छान्नुहोस्:
जीव विज्ञान – Zoology: 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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'Rosie', the first transgenic cow (1997), produced milk enriched with:
सही उत्तर: ख) human alpha-lactalbumin
Rosie's milk contained human α-lactalbumin (about 2.4 g/L) and was nutritionally more balanced for human babies than ordinary cow milk.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Lac, used in making varnishes and sealing wax, is a resinous secretion of the insect:
सही उत्तर: ख) Kerria (Laccifer) lacca
The female lac insect Kerria lacca secretes lac from dermal glands while feeding on host trees such as kusum and palash.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Silk is obtained from the cocoons of the silkworm Bombyx mori, whose caterpillars feed on the leaves of:
सही उत्तर: घ) mulberry
Mulberry silk, the most common kind, is produced by Bombyx mori larvae reared on mulberry (Morus) leaves; silk farming is called sericulture.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The brain (cranial) capacity of Homo erectus, which lived about 1.5 million years ago, was about:
सही उत्तर: क) 900 cc
Homo habilis had 650–800 cc, Homo erectus about 900 cc and Neanderthal man about 1400 cc.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Nicotine in tobacco raises blood pressure and heart rate because it stimulates the:
सही उत्तर: ख) adrenal medulla to release adrenaline and noradrenaline
Nicotine stimulates the adrenal medulla to release adrenaline and noradrenaline into the blood, both of which raise blood pressure and heart rate.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Cocaine, obtained from the coca plant (Erythroxylum coca), produces its effects mainly by:
सही उत्तर: घ) interfering with the transport of the neurotransmitter dopamine
Cocaine blocks dopamine reuptake, producing euphoria and increased energy; excess causes hallucinations.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An antibody (immunoglobulin) molecule is made up of:
सही उत्तर: ग) two heavy and two light polypeptide chains
Each antibody has four peptide chains, two heavy and two light, held by disulphide bonds; hence it is written H₂L₂.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The common cold in humans is caused mainly by:
सही उत्तर: घ) rhinoviruses
Rhinoviruses infect the nose and respiratory passages, causing the common cold; they do not infect the lungs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Syphilis, a sexually transmitted infection, is caused by:
सही उत्तर: ग) Treponema pallidum
Syphilis is caused by the spirochaete bacterium Treponema pallidum; Neisseria causes gonorrhoea.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Copper-releasing intrauterine devices such as Copper-T prevent pregnancy mainly because the copper ions:
सही उत्तर: क) suppress sperm motility and fertilising capacity
Cu ions released in the uterus reduce sperm motility and fertilising ability; IUDs also increase phagocytosis of sperm in the uterus.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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