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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Telomerase is best described as a:
सही उत्तर: ग) Reverse transcriptase carrying its own RNA template
Telomerase uses its internal RNA template to add TTAGGG repeats to chromosome ends; it is active in germ cells, stem cells and most cancers.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Okazaki fragments are formed during DNA replication on the:
सही उत्तर: ख) Lagging strand
DNA polymerase synthesises only 5'→3', so the lagging strand is made discontinuously in short Okazaki fragments later joined by DNA ligase.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Pellagra-like skin rash with neutral aminoaciduria, due to defective intestinal and renal absorption of tryptophan, is seen in:
सही उत्तर: घ) Hartnup disease
Hartnup disease is a defect of the neutral amino acid transporter; tryptophan loss reduces niacin synthesis, giving pellagra-like features.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Kinky (steely) hair, neurodegeneration and low serum copper and caeruloplasmin in an infant boy are due to mutation of:
सही उत्तर: क) ATP7A (Menkes disease)
Menkes disease is an X-linked defect of the ATP7A copper transporter, causing copper deficiency in tissues; ATP7B mutation causes Wilson disease (copper excess).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A cherry-red spot on the macula with progressive neurodegeneration but NO hepatosplenomegaly in an infant is typical of:
सही उत्तर: ख) Tay–Sachs disease
Tay–Sachs (hexosaminidase A deficiency, GM2 gangliosidosis) causes a cherry-red spot without organomegaly; Niemann–Pick has a cherry-red spot with hepatosplenomegaly.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Gaucher disease, the most common lysosomal storage disorder, is due to deficiency of:
सही उत्तर: ग) Glucocerebrosidase (β-glucosidase)
Glucocerebroside accumulates in macrophages ('crumpled tissue paper' Gaucher cells), causing hepatosplenomegaly and bone lesions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Self-mutilation, hyperuricaemia and choreoathetosis in a boy suggest deficiency of:
सही उत्तर: घ) Hypoxanthine-guanine phosphoribosyltransferase (HGPRT)
Lesch–Nyhan syndrome is an X-linked defect of the purine salvage enzyme HGPRT, leading to excess purine synthesis and uric acid.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Hereditary fructose intolerance, with hypoglycaemia and vomiting after eating fruit, is due to deficiency of:
सही उत्तर: घ) Aldolase B
Aldolase B deficiency traps fructose-1-phosphate, depleting phosphate and inhibiting gluconeogenesis and glycogenolysis; fructokinase deficiency (essential fructosuria) is benign.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Maple syrup urine disease is due to a defect in the metabolism of:
सही उत्तर: ग) Branched-chain amino acids (leucine, isoleucine, valine)
Deficiency of branched-chain α-keto acid dehydrogenase causes accumulation of branched-chain keto acids, giving the urine a sweet smell.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Urine that turns black on standing, with later ochronosis and arthritis, is caused by deficiency of:
सही उत्तर: ख) Homogentisate oxidase
In alkaptonuria, homogentisic acid accumulates, oxidises to a dark pigment in urine and deposits in connective tissue (ochronosis).
💬 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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