आधारभूत विज्ञान (Anatomy, Physiology, Biochemistry) – Basic Sciences MCQ
आधारभूत विज्ञान (Anatomy, Physiology, Biochemistry) – MD/MS प्रवेश
Basic Sciences · MECEE-PG – MD/MS/MDS Entrance · ४३३ प्रश्न
४३३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
आधारभूत विज्ञान (Anatomy, Physiology, Biochemistry): प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
-
Which one of the following enzymes plays a crucial role in the urea cycle, facilitating the removal of ammonia from the body?
सही उत्तर: क) Creatine Kinase
Carbamoyl phosphate synthetase I is the rate-limiting enzyme and primary catalyst in the urea cycle, responsible for converting ammonia to urea. The other options are involved in different metabolic pathways – creatine kinase in muscle contraction, lactate dehydrogenase in anaerobic glycolysis, and phosphofructokinase in glycolysis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following cell types is most closely associated with the formation of bone?
सही उत्तर: ख) Osteoblasts
Osteoblasts are responsible for synthesizing and secreting the organic components of bone matrix (collagen) and initiating mineralization. The other options represent cells involved in different tissue types – fibroblasts produce connective tissue, epithelial cells form coverings, and mast cells are part of the immune system.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The basal membrane of a nephron, composed of glomerular basement membrane and podocytes, plays a crucial role in filtration. What property primarily contributes to its selective permeability?
सही उत्तर: ग) A semi-permeable structure with controlled pore size allowing passage of small solutes while retaining large molecules
The basal membrane’s semi-permeability is key to filtration. It has a carefully constructed, porous structure which allows smaller molecules (like water and electrolytes) to pass through while preventing larger proteins and cells from crossing. Options 1 & 3 are incorrect as the membrane is relatively protein-poor and not uniform in thickness.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The Krebs cycle (Citric Acid Cycle) takes place within which organelle?
सही उत्तर: ग) Mitochondrion
The Krebs cycle is a central metabolic pathway occurring within the mitochondrial matrix. This cycle converts acetyl-CoA into carbon dioxide and generates energy carriers. Options 1, 2, and 3 are involved in other cellular processes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which hormone primarily stimulates the uptake of glucose from the blood by cells?
सही उत्तर: क) Insulin
Insulin is crucial for lowering blood glucose levels by promoting glucose uptake into cells. This effect relies on its interaction with insulin receptors. Options 2, 3, and 4 are involved in increasing or maintaining blood glucose.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following biochemical reactions contributes most significantly to the breakdown of glycogen?
सही उत्तर: क) Oxidation of fatty acids
The breakdown of glycogen into glucose is primarily achieved through a process called glycolysis. This involves the sequential breakdown of glucose molecules, as opposed to fat oxidation or gluconeogenesis. Option 3 represents glucose synthesis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The hormone vasopressin (antidiuretic hormone - ADH), produced in the posterior pituitary gland, is released in response to:
सही उत्तर: क) A. Decreased plasma osmolarity
Vasopressin (option A) is released when plasma osmolarity increases (detected by osmoreceptors in the hypothalamus), stimulating water reabsorption in the kidneys. Increased blood pressure, elevated potassium levels, and reduced GFR are not primary stimuli for ADH release.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following metabolic pathways is most directly regulated by insulin?
सही उत्तर: घ) D. Fatty acid synthesis
Lipolysis (option C) – the breakdown of fats – is a key target for insulin's action, as insulin promotes glucose uptake and reduces fat mobilization. The other options are not directly or primarily regulated by insulin.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following cell types primarily produces angiotensinogen, a key precursor in the renin-angiotensin system?
सही उत्तर: घ) D. Granulosa cells
Hepatocytes (option C) are responsible for synthesizing angiotensinogen, which is crucial for regulating blood pressure. Fibroblasts (option A), endothelial cells (option B), and granulosa cells (option D) do not play a primary role in angiotensinogen production.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following accurately describes the structure of the primary active transport system (Na+/K+ ATPase) found in cell membranes?
सही उत्तर: ख) B. It utilizes ATP hydrolysis to move ions against their concentration gradients.
Option B is correct; the Na+/K+ ATPase utilizes the energy from ATP hydrolysis to actively pump sodium ions out of the cell while bringing potassium ions into it, effectively establishing concentration gradients against their natural flow. Options A and D are incorrect descriptions of the process.
💬 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।