स्नातकोत्तर मेडिकल प्रवेश (MECEE-PG)
स्नातकोत्तर मेडिकल प्रवेश (MECEE-PG)
MECEE-PG – MD/MS/MDS Entrance · २,८६५ प्रश्न
२,८६५ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MD/MS 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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A drug given at a constant dosing rate reaches steady-state plasma concentration after approximately:
सही उत्तर: घ) 4 to 5 half-lives
With first-order elimination, about 94–97% of steady state is reached after 4–5 half-lives, regardless of dose.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which hepatitis virus is a DNA virus?
सही उत्तर: क) Hepatitis B virus
HBV is a partially double-stranded DNA virus (Hepadnaviridae) that replicates through reverse transcription; hepatitis A, C, D and E viruses are RNA viruses.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A fungus that grows as a mould at 25 °C and as a yeast at 37 °C is called dimorphic. Which of the following is a dimorphic fungus?
सही उत्तर: ख) Histoplasma capsulatum
Histoplasma, Blastomyces, Coccidioides, Paracoccidioides, Sporothrix and Talaromyces are thermally dimorphic; Cryptococcus is a yeast only, while Aspergillus and Rhizopus are moulds only.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A positive germ tube test within 2 hours in serum at 37 °C identifies:
सही उत्तर: ग) Candida albicans
Candida albicans forms germ tubes in serum (Reynolds–Braude phenomenon), distinguishing it from most other yeasts.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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To enter CD4+ T cells, the HIV envelope glycoprotein gp120 binds CD4 and a chemokine co-receptor, either:
सही उत्तर: क) CCR5 or CXCR4
gp120 binds CD4 and then CCR5 (macrophage-tropic) or CXCR4 (T-cell-tropic); gp41 then mediates membrane fusion.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Negri bodies in neurons of the hippocampus and Purkinje cells are diagnostic of:
सही उत्तर: घ) Rabies
Negri bodies are eosinophilic intracytoplasmic inclusions of rabies virus, classically in hippocampal pyramidal and cerebellar Purkinje cells.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Weil–Felix reaction for rickettsial infections uses antigens of:
सही उत्तर: क) Proteus strains (OX-19, OX-2, OX-K)
Rickettsiae share antigens with certain Proteus strains, so patient sera agglutinate Proteus OX-19, OX-2 or OX-K (heterophile agglutination).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Tetanospasmin causes spastic paralysis by:
सही उत्तर: घ) Blocking release of glycine and GABA from inhibitory interneurons
Tetanus toxin is transported retrogradely to the spinal cord and cleaves synaptobrevin in Renshaw and other inhibitory neurons, removing inhibition.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Diphtheria toxin kills cells by:
सही उत्तर: ग) ADP-ribosylation of elongation factor-2
Diphtheria toxin ADP-ribosylates EF-2 and halts protein synthesis; Shiga toxin cleaves 28S rRNA and cholera toxin raises cAMP.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Thiosulphate–citrate–bile salt–sucrose (TCBS) agar is a selective medium for:
सही उत्तर: ख) Vibrio cholerae
TCBS agar is selective for Vibrio species; V. cholerae forms yellow (sucrose-fermenting) colonies.
💬 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।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।