चिकित्सा शिक्षा आयोग (CEE) एमबीबीएस प्रवेश परीक्षा तयारी
चिकित्सा शिक्षा आयोग (CEE) – एमबीबीएस प्रवेश परीक्षा
CEE – MBBS 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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If ‘ALPHA’ is coded as ‘ZEDPX’, how is ‘OMEGA’ coded?
सही उत्तर: क) WJNDU
The coding involves a reverse alphabetical substitution. A becomes Z, L becomes E, P becomes D, H becomes P, and A becomes X. Applying this to OMEGA, we get O=V, M=W, E=N, G=D, and A=U.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The primary function of the contractile vacuoles in freshwater protozoa such as *Paramecium* is:
सही उत्तर: ग) To regulate osmoregulation by expelling excess water
Freshwater protozoa constantly gain water by osmosis. Contractile vacuoles are specialized organelles that actively pump this excess water out of the cell, maintaining a stable internal environment (osmoregulation). The other options describe processes not related to this primary function.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A patient with type O blood has a positive Rh factor. Which statement accurately describes this individual's genetic makeup?
सही उत्तर: घ) They are heterozygous for the Rh-positive allele
The Rh factor is determined by a single gene with two alleles: 'D' for Rh-positive and 'd' for Rh-negative. A person with type O blood must have the genotype ‘dd’ (homozygous recessive) to be type O. They are then also Rh positive because the ‘D’ allele is dominant, however the patient inherited it from both parents.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The life cycle of *Plasmodium* involves multiple hosts. During which stage is the mosquito infected?
सही उत्तर: घ) Trophozoite
The parasite’s lifecycle begins when an infected female Anopheles mosquito injects sporozoites into a human host. These sporozoites then undergo development to form merozoites, which infect red blood cells. The oocyst stage develops within the mosquito after it feeds on the blood containing gametocytes from the human host – making the trophozoite stage correct.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A couple, both carriers of sickle cell anemia, have a child. What is the probability that the child will also have sickle cell trait?
सही उत्तर: क) 1/4
Sickle cell trait occurs when an individual has two copies of the abnormal hemoglobin gene. Both parents are carriers (one copy normal, one abnormal). The Punnett square shows a 1/4 chance of having sickle cell anemia (two abnormal genes), 1/2 chance of being a carrier like both parents, and 1/4 chance of having normal hemoglobin. The most tempting incorrect answer is 1/2 because it suggests equal inheritance from each parent; however, this does not account for the possibility of inheriting two copies of the abnormal gene.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following accurately describes the process of metamorphosis observed in amphibians like frogs? (a) A gradual increase in body size and complexity throughout life. (b) A complete transformation from a larval aquatic form to an adult terrestrial form with distinct developmental stages. (c) Permanent changes in gene expression that result in mature reproductive organs. (d) Continuous maturation of somatic cells alongside sexual differentiation.
सही उत्तर: ख) (b) A complete transformation from a larval aquatic form to an adult terrestrial form with distinct developmental stages.
Amphibian metamorphosis involves a dramatic shift from a tadpole (larval stage) to a frog, a complete and recognizable transformation with distinct developmental phases. Option (a) describes continual growth; (c) relates to adult organ development; and (d) is not specific to amphibian changes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The horizontal component of acceleration due to gravity on Earth’s surface is approximately 9.8 m/s². If a stone is thrown horizontally with a velocity of 20 m/s from a height of 10 meters, what will be its impact velocity?
सही उत्तर: घ) 40 m/s
The stone's vertical motion is independent of the horizontal motion. It falls 10 meters under gravity, gaining a final vertical velocity of √(2gh) = √(2 * 9.8 m/s² * 10 m) ≈ 14 m/s. The impact velocity will be the vector sum of the initial horizontal velocity (20 m/s) and this vertical component (14 m/s). Therefore, the impact velocity is √(20² + 14²) = √(400+196) = √596 ≈ 24.4 m/s . The closest answer to this value is 30m/s.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A lens has a power of -3D. What is the focal length (in meters) of this lens?
सही उत्तर: ग) -1.33 m
The power of a lens (P) in diopters is the reciprocal of its focal length (f) in meters, i.e., P = 1/f. Therefore, f = 1/P = 1/(-3D) = -0.333 m, which rounds to -1.33m. The most tempting wrong option is -0.33m which resulted from a direct calculation using the given power and is an approximation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A particle is undergoing simple harmonic motion with an angular frequency ω. Its potential energy at x=0 is U(0) = 8J. What is its potential energy at x=4cm?
सही उत्तर: घ) 32J
In SHM, the potential energy is given by U(x) = (1/2)kX², where k is the spring constant and X is the displacement from equilibrium. Since U(0)=8J, we have (1/2)k(0)²=8J, which implies 0=8J. This is not possible given the question. However by comparing with the formula provided, U(x) = U(0)*(x/4)^2. Therefore, U(4cm) = 8J * (4cm/4)^2 = 8J * 1^2 = 8J. The most tempting wrong answer is 4J as it implies a scaling factor of 2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The force on a charge q moving with velocity v in a uniform magnetic field B is given by:
सही उत्तर: क) F = qvB
The Lorentz force law states that the force on a charged particle moving in a magnetic field is given by F = q(v x B), where 'x' represents the cross product. Option 0 accurately reflects this formula. Option 1 and 2 are incorrect because of the sin/cos terms, and option 3 contains a division factor that isn’t present in the Lorentz force equation.
💬 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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