चिकित्सा शिक्षा आयोग (CEE) बीडीएस प्रवेश परीक्षा तयारी
चिकित्सा शिक्षा आयोग (CEE) – बीडीएस प्रवेश परीक्षा
CEE – BDS Entrance · Medical Education Commission – CEE
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MBBS/BDS/Nursing 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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Intercalated discs facilitate cell-to-cell communication primarily through:
सही उत्तर: ग) Gap junctions allowing passage of ions and small molecules
Intercalated discs contain gap junctions which provide a direct pathway for the rapid movement of ions (like calcium) and small molecules between adjacent cardiac muscle cells. This is essential for synchronized contraction. The other options describe different types of cell junctions with varying functions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The clinical condition known as Kwashiorkor is primarily characterized by malnutrition resulting from a deficiency of:
सही उत्तर: ख) Fatty Acids
Kwashiorkor results from severe protein deprivation, typically in early childhood. The symptoms—edema, stunted growth, and skin lesions—are directly linked to the lack of sufficient amino acids for building and repairing tissues. While deficiencies in other nutrients can contribute, protein deficiency is the defining feature.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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7 : 80 :: 9 : ?
सही उत्तर: क) X
This is a ratio problem. We need to find the missing value following the same proportional relationship. 80 / 7 = 11.428... Therefore, 9 / X should also be approximately equal to this. Looking at the options, 'Z' most logically represents the answer that continues this unbalanced ratio.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A student performs an experiment to determine the solubility of lead(II) chloride (PbCl₂) in water at room temperature. They observe that the solution becomes cloudy after a certain time and measure the concentration of Pb²⁺ ions in the supernatant (top layer). What is the primary factor influencing the observed change?
सही उत्तर: ख) An increase in the ionic strength of the solution
The solubility product constant (Ksp) for PbCl₂ is low. As more Pb²⁺ ions dissolve, the ionic strength of the solution increases. This effectively shifts the equilibrium according to Le Chatelier’s principle.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The pH of 0.1 M hydrofluoric acid (HF) solution is best approximated by:
सही उत्तर: क) 0
HF is a weak acid and undergoes partial dissociation in water. The autoionization constant for HF (KwH₂F) is approximately 6.3 x 10⁻¹⁴. Calculating the hydrogen ion concentration [H⁺] from this value gives pH = -log[H⁺] ≈ 0.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction of a Grignard reagent (RMgX) with dimethylformamide (DMF), followed by hydrolysis, yields:
सही उत्तर: ग) an alcohol
Grignard reagents react with aldehydes and ketones to form alcohols after hydrolysis. DMF is an aldehyde derivative. Therefore, this reaction produces a secondary alcohol.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The rate of a reaction increases by a factor of e when the temperature is raised from 25°C to 35°C. The activation energy for this reaction is approximately:
सही उत्तर: ख) 100 kJ/mol
According to the Arrhenius equation, rate constant k is proportional to exp(-Ea/RT). Doubling the temperature (ΔT = 10°C) results in a rate increase factor of 'e'. The correct calculation involves relating this exponential change with the activation energy. A value of 100 kJ/mol for the activation energy gives the closest result.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A man has three sons. The first son is twice as old as the second son. The third son is half as old as the first son. If the average age of the three sons is 10 years, what is the age of the second son?
सही उत्तर: क) 8
Let the age of the second son be 'x'. Then the age of the first son is ‘2x’ and the age of the third son is ‘x/2’. The average age is (x + 2x + x/2)/3 = 10. Simplifying gives (5x + x)/6 = 10, so 6x/6=10 which means x = 10. Therefore, the second son is 10 years old. The other options are incorrect calculations based on the given average.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A clock is ticking. The minute hand moves at a rate of 6 degrees per second, and the hour hand moves at a rate of 0.5 degrees per second. At what time (in hours and minutes) will the two hands coincide?
सही उत्तर: ख) 3:44
The minute hand gains on the hour hand. The relative speed is 6 - 0.5 = 5.5 degrees per second. To cover a full circle (360 degrees), it takes 360/5.5 ≈ 65.45 seconds. Since 65.45 seconds is approximately 1 minute and 5 seconds, the hands will coincide at 3:55 (approximately). The closest option is 3:44.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The edible part of mango is the: a) Seed. b) Mesocarp. c) Endocarp. d) Epicuticle.
सही उत्तर: ग) c) Endocarp.
The edible part of a mango (C) is the fleshy endocarp that surrounds and protects the seed. The mesocarp is the outer layer, and the seed itself is inedible. Options A & D are incorrect terms describing different parts of the fruit.
💬 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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