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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Which plant hormone plays a crucial role in promoting fruit ripening?
सही उत्तर: ग) Ethylene
Ethylene is a key regulator of fruit ripening. It stimulates the breakdown of cell walls, leading to softening and changes associated with ripeness. While other hormones have roles in plant growth, ethylene specifically triggers the ripening process in many fruits.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The term 'alternation of generations' describes the life cycle of many plants. Which process specifically refers to the multicellular haploid stage that produces gametes?
सही उत्तर: ख) Gametophyte generation
Alternation of generations involves a diploid sporophyte phase producing haploid spores, which then develop into the dominant gametophyte generation. The 'gametophyte generation' is specifically the multicellular haploid stage responsible for producing gametes (spores or gametes themselves).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is NOT a primary function performed by phloem in vascular plants?
सही उत्तर: घ) Delivering water to photosynthetic cells
Phloem's main role is the transport of organic nutrients, particularly sugars. While it facilitates the movement of other substances like amino acids and hormones, its primary function isn’t supporting cell elongation which is primarily a function of xylem or delivering water to photosynthetic cells - these are functions of the xylem.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of 'double fertilization' results in the formation of which two structures within an angiosperm seed?
सही उत्तर: ख) An embryo and an endosperm
Double fertilization is a key characteristic of flowering plants (angiosperms). It involves the fusion of a male gamete with two different cells within the ovule – one to form the zygote (embryo), and the other to form the endosperm, which nourishes the developing embryo. The other options describe different developmental events but don't represent double fertilization.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The production of honey by bees primarily involves a process of: a) Fermentation of pollen grains. b) Chemical transformation of nectar through enzymatic reactions and dehydration. c) Absorption of sugar directly from the surrounding environment. d) Biological synthesis of sugars from atmospheric carbon dioxide.
सही उत्तर: ख) b) Chemical transformation of nectar through enzymatic reactions and dehydration.
Option B is correct; bees convert nectar into honey through a complex process involving enzymes (like invertase), reducing the water content, and creating unique flavor profiles. Options A, C, and D describe incorrect mechanisms for honey production.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following cellular adaptations is most characteristic of skeletal muscle tissue undergoing prolonged exercise? a) Hypertrophy – an increase in the size of individual muscle fibers. b) Atrophy – a decrease in the size and number of muscle fibers. c) Calcification – the deposition of calcium salts within muscle fibers. d) Fragmentation – the breakdown of muscle fibers into smaller pieces.
सही उत्तर: क) a) Hypertrophy – an increase in the size of individual muscle fibers.
Option A is correct; prolonged exercise induces hypertrophy, where skeletal muscle fibers grow larger due to increased protein synthesis. Options B, C and D describe other adaptations or pathologies in muscle tissue.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The ‘fight or flight’ response in mammals is largely mediated by which neurotransmitter released from the sympathetic nervous system? a) Dopamine b) Serotonin c) Norepinephrine (Noradrenaline) d) GABA
सही उत्तर: ग) c) Norepinephrine (Noradrenaline)
Option C is correct. Norepinephrine, also known as noradrenaline, is the key neurotransmitter released during the 'fight or flight' response, responsible for increasing heart rate, blood pressure, and alertness. Options A, B, and D are involved in different neurological processes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements accurately describes the function of the notochord in chordates? a) It provides structural support to the vertebral column during its development. b) It is a respiratory organ responsible for gas exchange. c) It serves as a primitive skeletal framework and guides early embryonic development. d) It primarily functions as a sensory organ detecting external stimuli.
सही उत्तर: ग) c) It serves as a primitive skeletal framework and guides early embryonic development.
Option C is correct; the notochord’s primary role is providing structural support and acting as a signaling center during early chordate development, influencing the formation of the neural tube and other body structures. Options A, B, and D are less accurate descriptions of the notochord's function.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of metamorphosis observed in amphibians like tadpoles transitioning into frogs primarily involves which developmental pathway? a) Direct development from an egg to a juvenile. b) Gradual changes in body form and physiology triggered by hormonal shifts. c) Rapid cell division without significant morphological alterations. d) Complete cellular breakdown followed by regeneration.
सही उत्तर: ख) b) Gradual changes in body form and physiology triggered by hormonal shifts.
Option B is correct because metamorphosis in amphibians involves dramatic transformations – limb development, tail resorption, and changes in skin and respiratory systems – all driven by hormonal regulation (primarily thyroxine). Options A, C, and D are incorrect as they describe alternative developmental pathways that don’t fit the amphibian metamorphosis process.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A monochromatic light of wavelength 500 nm falls on a single slit of width 0.25 mm. What is the value of the diffraction angle (θ) in degrees?
सही उत्तर: क) 1°
The diffraction angle (θ) is determined using the formula θ = λ / d, where λ is the wavelength and d is the slit width. Here, λ = 500 nm = 500 x 10⁻⁹ m and d = 0.25 mm = 0.25 x 10⁻³ m. So, θ = (500 x 10⁻⁹) / (0.25 x 10⁻³) = 2 x 10⁻² radians or approximately 1.14 degrees. The closest answer is 1°.
💬 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।