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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Six persons A, B, C, D, E and F sit around a circular table facing the centre. A sits opposite D. B is sitting between C and E. Who is sitting next to A?
सही उत्तर: क) F
Since A is opposite D and they are seated at a circular table with six people, the positions of the remaining people are determined. B is between C and E, so the arrangement is A-B-C-D-E-F. Therefore, F is sitting next to A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A researcher observes a group of animals exhibiting multiple distinct behaviors – foraging, mating, social interactions – all influenced by both internal physiological changes and external environmental cues. This behavior pattern best exemplifies:
सही उत्तर: घ) Neural fatigue.
Adaptive behavior describes the response of organisms to their environment through learning and modification of behavior. It involves a complex interplay of internal factors (like hormones) and external cues (like food availability or predator presence). The other options represent simpler and less flexible behavioral responses.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following cellular structures is primarily responsible for intracellular movement and transport?
सही उत्तर: ग) Cytoskeleton.
The cytoskeleton, composed of microtubules, microfilaments, and intermediate filaments, provides structural support to the cell, facilitates intracellular movement of organelles and molecules, and is crucial for cell division and shape maintenance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The term ‘synapse’ refers to the junction between two neurons. What is the primary function of this synapse?
सही उत्तर: ग) Transmission of signals from one neuron to another via chemical messengers.
A synapse is a specialized junction where information passes from one nerve cell (neuron) to another. The signal transmission occurs via neurotransmitters released at the synaptic cleft, facilitating communication between neurons.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of osmosis plays a critical role in maintaining water balance within animal cells. Which of the following best describes this process?
सही उत्तर: ख) Movement of water molecules across a semi-permeable membrane from a region of higher water potential to lower water potential.
Osmosis is defined as the movement of water across a semi-permeable membrane from an area of high water potential (low solute concentration) to an area of low water potential (high solute concentration). This process is driven by differences in water potential and is essential for maintaining cell volume.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A vertically thrown ball reaches its maximum height after a time ‘t’. What is the magnitude of its velocity at that instant?
सही उत्तर: घ) 4g
At the maximum height, the ball's vertical velocity becomes zero. Therefore, the velocity at the highest point is g/2 due to the equation v² = u² - 2gh (where u is initial upward velocity and h is the max height attained). The magnitude of the velocity at that instant will be g/2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A particle with charge ‘q’ and mass ‘m’ is moving with a velocity ‘v’ in space containing a uniform electric field E and a uniform magnetic field B perpendicular to the velocity v. The net acceleration of the particle is:
सही उत्तर: ख) E - B
The force on a charged particle in an electric field is qE, and the force on a charged particle in a magnetic field is qvB. Since these forces are perpendicular, they result in a net acceleration given by a = (qE + qvB) / m. In this case, B is uniform and perpendicular to v.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A current-carrying wire is placed in a uniform magnetic field. If the wire is rotated by 90 degrees, the magnitude of the force experienced by the wire will (assuming no change in magnetic field strength):
सही उत्तर: ग) Decrease linearly with the angle of rotation
The force on a current-carrying conductor in a magnetic field is given by F = BIl, where I is the current and L is the length of the conductor. Rotating the wire by 90 degrees changes the component of the current perpendicular to the magnetic field, but the product (B * l) remains constant. Therefore, the force will remain constant.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The vascular bundle in a maize plant is characterized by: (a) Presence of sclerenchyma cells only. (b) Arrangement of phloem on the outer side and xylem on the inner side. (c) Occurrence of both pholem and xylem in conjoint manner. (d) Absence of any parenchyma cells.
सही उत्तर: घ) (d) Absence of any parenchyma cells.
The vascular bundle in maize (corn) is a conjoint bundle containing both phloem and xylem arranged together with sclerenchyma cells for support. This arrangement differs from many other plants.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following best describes the role of chlorophyll ‘a’ and chlorophyll ‘b’ in photosynthesis? (a) They directly absorb sunlight energy and convert it into chemical energy. (b) They regenerate ATP and NADPH molecules after they have been used in the light-dependent reactions. (c) They protect the photosynthetic apparatus from excessive light damage. (d) They are involved in the initial carbon fixation steps of photosynthesis.
सही उत्तर: ख) (b) They regenerate ATP and NADPH molecules after they have been used in the light-dependent reactions.
Chlorophyll a is the primary pigment responsible for absorbing sunlight and initiating the photosynthetic process. Chlorophyll b assists by broadening the range of wavelengths absorbed.
💬 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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