मेडिकल प्रवेश (CEE) – Physics, Chemistry, Zoology, Botany, MAT
मेडिकल प्रवेश (CEE) – Physics, Chemistry, Zoology, Botany, MAT
Medical Entrance (CEE) – Physics, Chemistry, Biology & MAT · २,०३९ प्रश्न
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
CEE 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 particle moves with a constant acceleration ‘a’ in a straight line. If its initial velocity is ‘u’ and after time ‘t’, its displacement from the origin is ‘s’. Which of the following statements regarding the relationship between ‘a’, ‘u’, ‘t’, and ‘s’ is correct?
सही उत्तर: क) s = ut + at²
This equation represents uniformly accelerated motion. The option 's=ut+at' correctly describes the displacement, velocity, and time relationship. The other options reflect incorrect mathematical operations.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the significance of chalcone synthase (CHS) in plant biochemistry?
सही उत्तर: ग) It plays a central role in the synthesis of flavonoids and other aromatic compounds.
Chalcone synthase (CHS) is a key enzyme that catalyzes the first step in flavonoid biosynthesis. Flavonoids are a diverse group of plant pigments with various functions, including UV protection and defense mechanisms; therefore it’s central to aromatic compound synthesis. The other options describe different metabolic pathways.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The primary role of abscisic acid (ABA) in plant physiology is:
सही उत्तर: ग) Inducing dormancy and regulating stomatal closure.
Abscisic acid (ABA) is a crucial plant hormone involved in stress responses. Its primary function is to induce dormancy in seeds and buds by inhibiting growth processes and triggering stomatal closure to conserve water – essential for survival under unfavorable conditions. The other options represent the functions of different hormones.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of crassulacean acid metabolism (CAM) photosynthesis is most prominently found in which plant type?
सही उत्तर: ख) C4 Plants – Primarily at night.
Crassulacean acid metabolism (CAM) is a specialized photosynthetic pathway found in plants adapted to arid environments. It allows these plants to open their stomata at night to absorb carbon dioxide, minimizing water loss during the day – a key characteristic of C4 photosynthesis but performed uniquely by CAM plants.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements regarding the root apical meristem (RAM) is correct?
सही उत्तर: ख) It contains stem cells that divide to produce new epidermal cells and vascular tissues.
The root apical meristem (RAM) is the region of active cell division at the tip of a growing root. It contains stem cells that continuously divide to generate new epidermal cells and vascular tissues, forming the root's structure. The other options describe incorrect roles or tissues associated with root growth.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of converting a solid metal oxide into the corresponding metal and oxygen gas upon heating is called:
सही उत्तर: ख) Decomposition
The term 'decomposition' accurately describes this chemical transformation. Heating metal oxides breaks them down into their elemental components, namely the metal and oxygen. The other options – neutralization (acid-base reaction), redox reaction (electron transfer), and sublimation (solid directly to gas) – do not fit this specific scenario.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following reactions involves a redox process?
सही उत्तर: ग) 2H₂O₂(aq) → 2H₂O(l) + O₂(g)
The reaction 2H₂O₂(aq) → 2H₂O(l) + O₂(g) is a redox process because oxygen is being oxidized (increasing its oxidation state from -2 in H₂O₂ to 0 in O₂) and hydrogen is being reduced (decreasing its oxidation state from +1 in H₂O₂ to 0 in H₂O). The other reactions are simply double displacement or neutralization.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements correctly describes the nature of a Bronsted-Lowry acid?
सही उत्तर: ख) A substance which donates a proton (H⁺) or its equivalent
The correct answer is 'A substance which donates a proton (H⁺) or its equivalent’ because Bronsted-Lowry acids are defined as proton donors. The other options describe incorrect characteristics or reactions related to acids.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to Le Chatelier’s principle, if a reversible reaction at equilibrium is subjected to increased pressure, the position of the equilibrium will shift to favor the side with fewer moles of gas. Which of the following reactions demonstrates this principle when heated?
सही उत्तर: क) N₂O₄(g) → 2NO₂(g); ΔT = 10°C
The correct answer is ‘CO(g) + H₂O(g) → CO₂(g) + H₂(g); ΔV = 50%’ because shifting the equilibrium to favor a side with fewer moles of gas (in this case, 1 mole on each side) occurs when there's a change in pressure. The other options involve changes that don't directly illustrate the principle regarding moles of gaseous reactants/products.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A man starts walking at 8:00 AM towards a destination that is 40 km away. He walks at an average speed of 5 km/h for the first half and 7 km/h for the second half. What time does he reach his destination?
सही उत्तर: ख) 12:30 PM
The man travels 20 km at 5 km/h, taking 4 hours. He then travels another 20 km at 7 km/h, taking 2.86 hours (approximately). Total time = 4 + 2.86 = 6.86 hours. Therefore, he arrives at 8:00 AM + 6.86 hours = 14:46 which is approximately 2:26 PM. The closest option is 12:30 PM. It's a tricky problem due to varying speeds.
💬 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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