चिकित्सा शिक्षा आयोग (CEE) बीएस्सी नर्सिङ र बीएनएस प्रवेश तयारी
चिकित्सा शिक्षा आयोग (CEE) – बीएस्सी नर्सिङ र बीएनएस प्रवेश
B.Sc. Nursing & BNS 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 presence of a waxy cuticle on leaves is primarily adapted for: (a) Facilitating photosynthesis by increasing light absorption. (b) Reducing water loss through transpiration. (c) Increasing the surface area for gas exchange. (d) Providing structural support to the leaf blade.
सही उत्तर: ख) Reducing water loss through transpiration.
Option (b) is correct; the waxy cuticle is a key adaptation that reduces evaporation of water from the plant's surface—transpiration. Options (a), (c), and (d) describe other functions or structures in leaves.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements best describes the role of CAM photosynthesis in plants? (a) It occurs simultaneously with normal C3 photosynthesis. (b) It is faster than C3 photosynthesis under all conditions. (c) It minimizes water loss by concentrating CO2 within specialized cells. (d) It relies on a cyclical exchange of carbon dioxide between mesophyll and bundle sheath cells.
सही उत्तर: घ) It relies on a cyclical exchange of carbon dioxide between mesophyll and bundle sheath cells.
Option (c) accurately describes CAM photosynthesis – plants like cacti use this strategy to reduce water loss by fixing CO2 in vacuoles rather than open stomata. Options (a), (b), and (d) are incorrect because they misrepresent the core processes of CAM metabolism.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The primary function of phloem in plants is to: (a) Transport water and minerals from roots to stems and leaves. (b) Translocate sugars produced during photosynthesis from source to sink. (c) Provide structural support to the plant body. (d) Conduct electrical impulses throughout the plant.
सही उत्तर: ख) Translocate sugars produced during photosynthesis from source to sink.
Option (b) is correct because phloem is responsible for transporting sugars, the primary product of photosynthesis, throughout the plant. Options (a), (c), and (d) describe functions of xylem, sclerenchyma, and nerve cells respectively, which are not associated with phloem.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of fertilization in mammals involves the fusion of a sperm cell with an egg cell. Which hormone plays a crucial role in preparing the uterine lining for implantation of the developing embryo? (A) Insulin (B) Estrogen (C) Progesterone (D) Testosterone
सही उत्तर: ग) (C) Progesterone
Progesterone is essential for maintaining the uterine lining during pregnancy and preparing it to receive and nourish a fertilized egg. Estrogen also plays a role but is less directly involved in implantation preparation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is a key characteristic of cartilaginous fishes? (A) They possess a swim bladder for buoyancy control. (B) They have a bony skeleton with rigid joints. (C) They exhibit skeletal gills supported by cartilage. (D) They lack a true vertebral column.
सही उत्तर: ग) (C) They exhibit skeletal gills supported by cartilage.
Cartilaginous fishes, like sharks and rays, are defined by their skeletons which include cartilaginous supports for the gills. A swim bladder is found in bony fish, (B) describes a bony structure, and (D) is incorrect as they have a vertebral column.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following structures is responsible for the maintenance of body temperature in mammals? (A) Epidermis (B) Hypothalamus (C) Skeletal muscle (D) Liver
सही उत्तर: ख) (B) Hypothalamus
The hypothalamus in the brain acts as a thermostat, regulating body temperature by initiating responses like shivering or sweating. Option (C) is incorrect because muscles generate heat, and option (D) is not directly involved in temperature regulation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of osmosis involves the movement of water across a semi-permeable membrane. Which of the following best explains why red blood cells (RBCs) swell when placed in distilled water? (A) Water moves into RBCs because the concentration of solutes inside is lower than outside. (B) Water moves into RBCs because the concentration of solutes inside is higher than outside. (C) Solutes move out of RBCs due to active transport, creating a pressure gradient. (D) The membrane of RBCs becomes permeable to water under osmotic pressure.
सही उत्तर: क) (A) Water moves into RBCs because the concentration of solutes inside is lower than outside.
Osmosis occurs when there's a difference in water concentration across a semi-permeable membrane. Because the distilled water has essentially no solutes, water moves into the RBCs down this concentration gradient. (B) is incorrect because it describes a situation where water would move *out*.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements accurately describes the function of cilia in respiratory epithelium? (A) They facilitate gas exchange between air and blood. (B) They trap particulate matter and pathogens from inhaled air. (C) They contract to propel mucus towards the pharynx for swallowing. (D) They increase the surface area available for absorption of nutrients.
सही उत्तर: ख) (B) They trap particulate matter and pathogens from inhaled air.
Cilia are hair-like structures that beat in a coordinated manner, moving mucus and trapped particles upwards out of the lungs. This prevents irritation and infection. Option (A) describes gas exchange, (C) is correct, and (D) relates to absorption which isn't the primary function of cilia.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The enthalpy change (ΔH) for the reaction CaCO₃(s) → CaO(s) + CO₂(g) is approximately -178 kJ/mol. Which of the following statements regarding this process is correct?
सही उत्तर: ख) It indicates an exothermic reaction as heat is released
This is an exothermic reaction because heat (energy) is released during the formation of solid CaO and gaseous CO₂ from a solid. The negative sign in enthalpy change signifies heat release. The other options are incorrect as they relate to factors like heat absorption or focus solely on ΔH's magnitude without considering its sign.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If a series of numbers is defined as follows: 1, 4, 9, 16, 25,... What would be the next number in this sequence?
सही उत्तर: क) 30
This sequence represents the squares of consecutive integers (1², 2², 3², 4²... ). The next number is 5² = 25. The other options result from incorrectly adding or multiplying terms in the series.
💬 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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