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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A beam of light is incident on a rectangular slab placed in front of a plane mirror. If the refractive index of the slab for light travelling parallel to its surface is 1.5, what will be the angle of deviation of the reflected ray from the normal? (a) 30° (b) 45° (c) 60° (d) 90°
सही उत्तर: क) (a) 30°
The angle of deviation is determined by the thickness and refractive index of the slab. When light passes through a rectangular slab, it bends at two angles – one when entering and one when exiting. The overall deviation is the difference between these two angles. In this case, with a refractive index of 1.5, the bending will be significant, leading to a larger deviation angle. Option (a) represents the most plausible value for the angle of deviation based on these principles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is a defining characteristic of C₄ plants in terms of their photosynthetic carbon fixation pathway?
सही उत्तर: ग) They initially fix CO₂ into a four-carbon compound before producing sugars
C₄ plants employ a unique two-step carbon fixation process initiated by the enzyme PEP carboxylase, which first fixes CO₂ into a four-carbon molecule (oxaloacetate) before it's broken down to produce sugars. RuBisCO is used in C₃ plants.”} , 3, 2, 1]}
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The 'Yarsagumba' product is a composite of which two biological components?
सही उत्तर: ख) Pollen and Fungus
Yarsagumba (also known as ‘Corpse Flower’) consists of the fruiting body of the Cordyceps fungus, which parasitizes insects, and the male reproductive organs of the insect host. The other options represent different plant parts or fungal structures.”} , 3, 2, 1],
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following correctly describes the primary role of coleoptile in a seedling?
सही उत्तर: ख) To facilitate photosynthesis within the young shoot
The coleoptile is a protective sheath surrounding the young shoot (plumule) of a plant. It shields it from physical damage as it pushes through the soil. Photosynthesis primarily occurs in leaves, while roots absorb water and minerals.”} , 3, 2, 1],
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process by which plants absorb water through their roots and subsequently lose it as a liquid through specialized structures on the leaf surface is known as:
सही उत्तर: क) Transpiration
Guttation is specifically defined as the loss of water in droplet form from plant leaves, primarily due to root pressure. Transpiration involves water vapor loss via stomata, respiration uses oxygen and produces carbon dioxide, and photosynthesis converts light energy into chemical energy.”} , 5, 4, 3, 2, 1],
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following structures is primarily responsible for the opening and closing of stomata, regulating gas exchange and transpiration in plants?
सही उत्तर: ख) Guard Cells
Guard cells are specialized cells that actively respond to environmental stimuli (like light and water availability) by changing their turgor pressure, which directly controls the opening and closing of stomata. Chloroplasts conduct photosynthesis, xylem transports water, and phloem transports sugars – these do not regulate stomatal movement.”}],
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A group of people are standing in a circle. Person A tells person B that he is to his right. Person B tells person C that he is to her left. Person C tells person D that he is to her right. If this continues indefinitely, who is person A facing?
सही उत्तर: क) Person D
This is a classic lateral thinking puzzle. The statement repeats around the circle. Since it starts with 'to his right', the sequence moves clockwise. Thus, Person A faces Person D.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a sequence: 2, 6, 12, 20, 30, ?
सही उत्तर: घ) 60
The differences between consecutive terms are 4, 6, 8, 10. So the next difference should be 12. Therefore, the next term is 30 + 12 = 42. The other options do not follow this pattern of increasing differences.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The half-life of a radioactive isotope is 20 years. What fraction of the original sample will remain after 60 years?
सही उत्तर: ख) 1/4
Half-life represents the time it takes for half of a substance to decay. After two half-lives (20 years x 2), the remaining fraction is (1/2)*(1/2) = 1/4.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What volume of 0.5 M solution of sodium chloride (NaCl) would be required to prepare 200 ml of a 0.1 M solution?
सही उत्तर: घ) 320 ml
This is a dilution problem. M₁V₁ = M₂V₂. Therefore (0.5)(V₁) = (0.1)(200), so V₁= 40 ml.
💬 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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