चिकित्सा स्नातकोत्तर प्रवेश (MECEE-PG) MD / MS / MDS प्रवेश परीक्षा तयारी
चिकित्सा स्नातकोत्तर प्रवेश (MECEE-PG) – MD / MS / MDS प्रवेश परीक्षा
MECEE-PG – MD/MS/MDS · MECEE-PG (MD/MS/MDS)
२,८६५ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MD/MS/MDS प्रवेश: 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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Cyanide is toxic because it inhibits:
सही उत्तर: ग) Cytochrome c oxidase (complex IV)
Cyanide binds the ferric iron of cytochrome a₃ in complex IV, halting electron transport and aerobic ATP production.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The rate-limiting enzyme of haem synthesis is:
सही उत्तर: ख) δ-Aminolevulinic acid (ALA) synthase
ALA synthase (needing pyridoxal phosphate) catalyses the first, rate-limiting step of haem synthesis and is feedback-inhibited by haem.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The rate-limiting enzyme of the urea cycle is:
सही उत्तर: घ) Carbamoyl phosphate synthetase I
Mitochondrial CPS-I, allosterically activated by N-acetylglutamate, controls the rate of urea synthesis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The rate-limiting enzyme of glycolysis is:
सही उत्तर: क) Phosphofructokinase-1
PFK-1, which converts fructose-6-phosphate to fructose-1,6-bisphosphate, is the main control point of glycolysis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Lesions of the ventromedial nucleus of the hypothalamus in experimental animals cause:
सही उत्तर: घ) Hyperphagia and obesity
The ventromedial nucleus is the satiety centre; its destruction causes overeating, whereas lateral hypothalamic lesions cause aphagia.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Sleep spindles and K-complexes on the EEG are characteristic of:
सही उत्तर: ख) Stage N2 non-REM sleep
N2 sleep shows sleep spindles and K-complexes; N3 shows delta waves, REM shows low-voltage mixed-frequency (sawtooth) waves, and relaxed wakefulness shows alpha rhythm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Intention tremor, dysdiadochokinesia and past-pointing are signs of a lesion in the:
सही उत्तर: ग) Cerebellum
These are classic cerebellar signs; basal ganglia disease typically causes a resting tremor.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The receptor that detects changes in muscle length and initiates the stretch reflex is the:
सही उत्तर: क) Muscle spindle
Muscle spindles (intrafusal fibres with Ia afferents) sense stretch; Golgi tendon organs sense tension and mediate the inverse stretch reflex.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Milk ejection (let-down) during breastfeeding is caused by oxytocin acting on:
सही उत्तर: घ) Myoepithelial cells around the alveoli
Suckling triggers oxytocin release from the posterior pituitary, which contracts myoepithelial cells to eject milk; prolactin drives milk synthesis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The renal 1α-hydroxylase that produces active vitamin D (calcitriol) is directly stimulated by:
सही उत्तर: ग) Parathyroid hormone
PTH (and low phosphate) stimulates 1α-hydroxylase in the proximal tubule; FGF-23 and high phosphate inhibit it.
💬 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।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
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