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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The phenomenon of ‘poikilothermy’ is most closely associated with which characteristic of ectothermic animals? (a) Maintaining a constant internal body temperature regardless of the external environment. (b) Dependence on external sources for thermoregulation, such as basking in sunlight or seeking shade. (c) Having a highly developed nervous system capable of coordinating complex behavioral responses to temperature changes. (d) Exhibiting rapid metabolic rates dependent on environmental temperature fluctuations.
सही उत्तर: ख) (b) Dependence on external sources for thermoregulation, such as basking in sunlight or seeking shade.
Option (b) is correct. Poikilothermy refers to the ability of ectothermic animals to maintain a variable body temperature, relying heavily on their environment for warmth. Options (a), (c) and (d) misrepresent fundamental aspects of endothermic vs. ectothermic physiology.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements accurately describes the process of metamorphosis observed in amphibians like frogs? (a) A gradual transformation with continuous growth and development of adult features throughout life. (b) A sudden, complete replacement of larval structures by adult structures in a single event. (c) A series of discrete developmental stages characterized by distinct morphological changes and physiological adaptations that occur over time. (d) Primarily asexual reproduction followed by genetic recombination during the transition period.
सही उत्तर: ग) (c) A series of discrete developmental stages characterized by distinct morphological changes and physiological adaptations that occur over time.
Option (c) is correct because amphibian metamorphosis, such as that seen in frogs, involves a sequential process of transformation—the gradual loss of larval features like gills and tail, alongside the development of adult limbs and lungs. Options (a), (b) and (d) are incorrect as they describe different types of developmental processes or reproductive strategies that do not accurately represent amphibian metamorphosis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of conversion of gaseous nitrogen and oxygen to form liquid nitrogen monoxide is called: (a) Endothermic reaction (b) Exothermic reaction (c) Neutralization reaction (d) Oxidation-reduction reaction
सही उत्तर: ख) (b) Exothermic reaction
This describes a process where heat is released into the system, which is characteristic of an exothermic reaction. Option (a) describes absorbing heat. Options (c) and (d) refer to different chemical reactions with distinct principles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The term ‘phyllotaxy’ refers to:
सही उत्तर: ग) C) The color and pattern of plant pigments.
Option B is correct; phyllotaxy describes the spatial arrangement of leaves on a plant stem, influencing light capture efficiency. Option A addresses vascular structure, C deals with pigment characteristics, and D relates to root development.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following correctly describes the role of mucilage in plants?
सही उत्तर: घ) D) It facilitates the transport of nutrients throughout the plant.
Option C is correct – mucilage’s primary function is water storage which maintains turgor pressure. Options A focuses on structural components, B discusses defense mechanisms, and D describes nutrient transport.”} , { 2,
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The phenomenon of CAM (Crassulacean Acid Metabolism) photosynthesis primarily allows plants to adapt to which environmental condition?
सही उत्तर: घ) D) Rapid growth during the rainy season.
Option C is correct as CAM plants have evolved to minimize water loss by opening their stomata at night when it’s cooler and humid, allowing them to fix CO2 and then carry out photosynthesis during the day. Options A and D are unsuitable conditions for CAM adaptation, while B doesn't align with the core mechanism.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The typhlosole, a median fold in the intestine of the earthworm, serves to: (A) Increase surface area for nutrient absorption. (B) Provide skeletal support to the gut wall. (C) Facilitate peristaltic movements. (D) Absorb water and electrolytes.
सही उत्तर: ख) (B) Provide skeletal support to the gut wall.
The typhlosole is a median fold in the intestine of earthworms that significantly increases the surface area for nutrient absorption. This aids digestion by providing more space for enzymes to act upon food. The other options are incorrect as they relate to different functions or structures.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which ion is essential for blood coagulation? (A) Sodium ions (Na+) (B) Calcium ions (Ca2+) (C) Potassium ions (K+) (D) Magnesium ions (Mg2+)
सही उत्तर: ख) (B) Calcium ions (Ca2+)
Calcium ions (Ca2+) are crucial for the activation of clotting factors in the blood coagulation cascade. While other ions play roles in physiological processes, calcium is fundamentally involved in forming a stable fibrin clot – making it the correct answer. Sodium, potassium and magnesium do not directly participate in this process.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction between hydrochloric acid (HCl) and sodium carbonate ((Na₂CO₃)) is used to demonstrate an acid-base reaction. Which of the following observations would best indicate that this reaction has occurred? a) The solution remains clear and colorless. b) Formation of a white precipitate, carbon dioxide gas evolution, and water. c) A decrease in temperature throughout the experiment. d) The addition of more HCl causes the reaction to speed up.
सही उत्तर: ख) b
The reaction between HCl and Na₂CO₃ produces sodium chloride (NaCl), water (H₂O), and carbon dioxide gas (CO₂). The formation of a white precipitate and the evolution of CO₂ are the key indicators that this acid-base reaction has taken place. Option (a) is wrong because a reaction *would* be observed; (c) is incorrect about temperature change, and (d) describes speeding up a reaction which isn't how it works.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The energy stored in a parallel-plate capacitor filled with an insulator is given by which formula?
सही उत्तर: ख) B) E = CV
The correct answer is (B). The energy stored in a parallel-plate capacitor is given by the equation E = CV, where C is the capacitance and V is the voltage across the plates. Options A, C and D represent incorrect formulas – option A calculates charge instead of energy, option C incorrectly combines charge and capacitance, and option D isn't applicable to this scenario.
💬 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।
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