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 of the following adaptations is MOST characteristic of plants adapted to xerophytic (dry) environments?
सही उत्तर: ख) B. Succulent stems and reduced leaf surface area to minimize water loss.
Xerophytes have evolved specific features to conserve water in arid environments. Succulent stems and reduced leaves are key adaptations that drastically reduce the surface area exposed to the sun and minimize evaporation. Option A is characteristic of plants in humid climates; option C relates to nutrient acquisition, and option D involves vascular tissue.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of osmosis plays a vital role in water transport within plant tissues. What primarily drives this movement?
सही उत्तर: ग) C. Differences in water potential between the soil and the plant roots.
Osmosis is driven by differences in water potential – essentially, the tendency of water to move from an area of high water potential (e.g., the soil) to an area of low water potential (e.g., inside plant roots). This movement maintains turgor pressure and facilitates nutrient uptake. Options A, C, and D represent other mechanisms involved but aren’t the primary driver.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following botanical terms correctly identifies the structure responsible for the production of male gametes in gymnosperms?
सही उत्तर: ग) C. Pollen Grain
The pollen grain contains the male gametes (sperm cells) necessary for fertilization in gymnosperms. The ovule holds the female gamete, a megaspore is a larger spore used in seed development and an embryo sac houses the female gametes in angiosperms. This is the core function of a pollen grain.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The primary function of CAM photosynthesis in plants like pineapple is to:
सही उत्तर: ख) B. Minimize water loss by separating carbon dioxide uptake and sugar synthesis.
CAM (Crassulacean Acid Metabolism) photosynthesis is adapted to arid environments where water conservation is crucial. It achieves this by separating the processes of CO2 uptake and sugar synthesis, dramatically reducing water loss. Option A describes C3 photosynthesis; option C relates to chlorophyll, and option D represents a general growth mechanism.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The residual volume of air remaining in the lungs after maximal expiration is known as: a) Tidal Volume b) Expiratory Reserve Volume c) Residual Volume d) Vital Capacity
सही उत्तर: ग) c) Residual Volume
The correct answer is (c) Residual Volume. This refers to the air that remains in the lungs even after a full exhalation. Options A, B and D relate to different phases of breathing but do not define residual volume.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Antidiuretic hormone (ADH) primarily increases water reabsorption in the: a) Arteries b) Kidneys c) Liver d) Brain
सही उत्तर: ख) b) Kidneys
The correct answer is (b) Kidneys. ADH acts on the collecting ducts of the nephron in the kidneys, increasing water reabsorption back into the bloodstream. Options A, C, and D are incorrect as they do not directly participate in this mechanism.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Fertilization in mammals typically occurs in the: a) Small Intestine b) Uterus c) Fallopian Tube d) Cervix
सही उत्तर: ग) c) Fallopian Tube
The correct answer is (c) Fallopian Tube. Fertilization occurs within the ampulla of the fallopian tube, where sperm and egg are most likely to meet. Options A, B, and D represent other parts of the female reproductive system involved in supporting or protecting the embryo, but not the site of fertilization.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the primary chemical basis for the use of hydrogen peroxide (H₂O₂) as a disinfectant?
सही उत्तर: ग) It decomposes into oxygen and water, producing a toxic environment for microorganisms
Hydrogen peroxide decomposes into water and oxygen. The released oxygen is highly toxic to most microorganisms, effectively killing them. Options A, B and C are incorrect as they describe chemical reactions that don't explain the disinfectant properties.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements best describes the effect of increasing the surface area of a solid reactant in a heterogeneous reaction?
सही उत्तर: ग) It increases the reaction rate proportionally
Increasing the surface area provides more contact between the reactants and catalyst (if present), significantly increasing the reaction rate. Options A and B are incorrect as surface area directly influences reaction kinetics. Option D is partially true, but doesn't fully explain why it increases the rate; a larger surface area leads to more collisions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of converting ammonia into nitric oxide is industrially important. What is the primary reason this conversion is carried out?
सही उत्तर: ख) To reduce the production of unwanted byproducts like nitrogen dioxide
The main reason for converting ammonia to nitric oxide industrially is to minimize the formation of nitrogen dioxide (NO₂), a significant pollutant. Option A is incorrect because oxygen concentration isn't the primary factor; B correctly identifies NO₂ reduction, C is false as temperature changes are typically managed via catalysts, and D inaccurately describes fertilizer synthesis.
💬 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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