चिकित्सा शिक्षा आयोग (CEE) बीएस्सी नर्सिङ र बीएनएस प्रवेश तयारी

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

511. The process of muscle contraction involves a sliding filament mechanism. Which protein filaments are directly responsible for this sliding action?

     कA. Keratin and collagen. खB. Actin and myosin. गC. Tubulin and tropomyosin. घD. Chitin and sclerin.
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512. A particle moving with a velocity 'v' enters a uniform magnetic field perpendicular to its direction. What is the magnitude of the force acting on the particle?

     कmv ख2mv ग0 घmv^2
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513. A light bulb has a resistance of 600 ohms and is connected to a 120 V power supply. What is the current flowing through the bulb?

     क0.2 A ख2 A ग3 A घ4 A
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514. A particle moves with a velocity vector v = (3t, 4t - 2) where t is in seconds. What is the acceleration of the particle at t=1 second?

     क(3, 6) m/s² ख(3, 4) m/s² ग(7, 4) m/s² घ(7, 0) m/s²
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515. The hydrolysis of which of the following compounds would produce a basic solution?

     कCH₃COONa खCH₃CH₂COOH ग(CH₃)₂NH घHCl
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516. Which of the following statements correctly describes the effect of increasing the concentration of a catalyst in a reversible reaction?

     कThe rate of the forward reaction decreases खThe rate of both the forward and reverse reactions decrease equally गThe rate of the forward reaction increases घThe equilibrium constant remains unchanged
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517. The reaction: N₂O₄ → 2NO₂ takes place in a closed container at constant volume. At equilibrium, the partial pressure of NO₂ is 400 torr. What is the partial pressure of N₂O₄ at this equilibrium?

     क800 torr ख200 torr ग1600 torr घ400 torr
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518. The molar solubility of silver chloride (AgCl) in water at 25°C is 1.93 x 10⁻³ M. Ksp for AgCl is:

     क1.93 x 10⁻³ ख3.94 x 10⁻¹⁰ ग1.89 x 10⁻¹⁰ घ7.65 x 10⁻¹⁰
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519. The process of vegetative propagation, where new plants arise from parts of the parent plant, is most effectively achieved through: a) Cross-pollination between different plant varieties. b) Production of specialized structures like bulbs, tubers, or rhizomes. c) Direct injection of hormones into the plant’s vascular system to stimulate growth. d) The application of fertilizers to promote root development.

     कa) Cross-pollination between different plant varieties. खb) Production of specialized structures like bulbs, tubers, or rhizomes. गc) Direct injection of hormones into the plant’s vascular system to stimulate growth. घd) The application of fertilizers to promote root development.
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520. Which of the following represents a key difference between xylem and phloem tissues within a flowering plant? a) Xylem transports sugars produced during photosynthesis while phloem transports water and minerals. b) Phloem carries amino acids, while xylem conducts starch. c) Xylem transports water and minerals upwards from roots to shoots, whereas phloem transports sugars downwards from leaves to other parts of the plant. d) Both tissues primarily transport oxygen throughout the plant.

     कa) Xylem transports sugars produced during photosynthesis while phloem transports water and minerals. खb) Phloem carries amino acids, while xylem conducts starch. गc) Xylem transports water and minerals upwards from roots to shoots, whereas phloem transports sugars downwards from leaves to other parts of the plant. घd) Both tissues primarily transport oxygen throughout the plant.
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