मेडिकल प्रवेश (CEE) – Physics, Chemistry, Zoology, Botany, MAT
मेडिकल प्रवेश (CEE) – Physics, Chemistry, Zoology, Botany, MAT
Medical Entrance (CEE) – Physics, Chemistry, Biology & MAT · २,०३९ प्रश्न
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
CEE 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 blood group is most likely to have plasma containing anti-B antibodies? (a) Blood Group A (b) Blood Group B (c) Blood Group AB (d) Blood Group O
सही उत्तर: घ) (d) Blood Group O
Blood group AB individuals have both A and B antigens on their red blood cells, thus eliciting an immune response against both anti-A and anti-B antibodies in the plasma. Therefore, plasma of AB blood group contains both anti-A and anti-B antibodies. Options (a), (b) and (d) are incorrect because they have only one type of antibody.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The ‘lub’ sound heard during a heartbeat represents: (a) The forceful contraction of the ventricles. (b) The opening of the mitral valve. (c) The closing of the tricuspid valve. (d) The relaxation of the atria.
सही उत्तर: ग) (c) The closing of the tricuspid valve.
The ‘lub’ sound is caused by the closure of the heart valves, specifically the tricuspid valve. This creates a sharp, distinct sound. Option (a) describes the ‘dub’ sound created by ventricular contraction, and (c) and (d) relate to other phases and valves.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements accurately describes the role of mitochondria in eukaryotic cells? (a) They are primarily involved in protein synthesis. (b) They generate ATP through cellular respiration. (c) They store genetic information for cell division. (d) They provide structural support to the cell.
सही उत्तर: ख) (b) They generate ATP through cellular respiration.
Mitochondria are known as the ‘powerhouses’ of the cell because they carry out cellular respiration, a process that converts glucose and oxygen into ATP (adenosine triphosphate), the primary energy currency for cells. Option (a) is the function of ribosomes, (c) describes the role of the nucleus, and (d) is the role of the cytoskeleton.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The primary function of goblet cells in the human respiratory tract is to: (a) Transport oxygen throughout the body (b) Secrete mucus to trap pathogens and debris (c) Absorb nutrients from inhaled air (d) Stimulate cilia movement for clearing airways
सही उत्तर: ख) (b) Secrete mucus to trap pathogens and debris
Goblet cells are specialized epithelial cells that secrete mucin, a glycoprotein which forms mucus. This mucus traps inhaled particles like dust and microorganisms, protecting the respiratory tract. Option (a) describes the function of capillaries, (c) relates to absorption in the small intestine, and (d) describes the function of cilia.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements accurately describes the role of a catalyst in a chemical reaction?
सही उत्तर: ग) c) It speeds up the rate of both forward and reverse reactions without being consumed.
A catalyst accelerates a chemical reaction by lowering its activation energy, thus increasing the rates of both the forward and reverse reactions. This is achieved without being permanently altered itself. Options (a), (b), and (d) are incorrect descriptions of a catalyst's function.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction of ethanol with excess hydrochloric acid produces which of the following products?
सही उत्तर: क) a) Ethanoic acid
Ethanol reacts with concentrated HCl to form chloroethane (chloromethane) and a small amount of ethanol. This is due to the reaction occurring at both ends of the molecule, following Markovnikov’s rule. Option (b) represents a different reaction pathway.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following combinations of elements would likely form an ionic compound?
सही उत्तर: ख) b) Na and Cl
Ionic compounds are formed between a metal and a nonmetal, where there’s a significant difference in electronegativity. Sodium (Na) and chlorine (Cl) represent this classical combination. Options (a), (c), and (d) involve elements with similar or smaller electronegativity differences.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of adding a reagent to a solution that decreases the concentration of hydrogen ions (H⁺) is termed:
सही उत्तर: क) a) Neutralization
Neutralization specifically refers to the reaction between an acid and a base, leading to a decrease in H⁺ concentration. Oxidation, acidification, and reduction are distinct chemical processes not directly related to this definition.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements best describes the concept of electronegativity?
सही उत्तर: ख) b) It is a measure of an atom’s ability to attract bonding pairs of electrons towards itself in a chemical bond.
Electronegativity, as defined by Pauling, is precisely a measure of an atom’s ability to attract bonding pairs of electrons. Options (a), (c), and (d) represent incomplete or misleading descriptions of electronegativity; option (b) accurately describes the core concept.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of respiration in humans involves the exchange of gases. Which of the following correctly describes the primary gas that diffuses *into* the lungs during inhalation? (A) Carbon Dioxide (B) Nitrogen (C) Oxygen (D) Hydrogen
सही उत्तर: ग) Oxygen
Oxygen is the key gas that moves into the lungs during inhalation to be used in cellular respiration. Carbon dioxide, the waste product, diffuses out (option A). Nitrogen is a major component of air but doesn't significantly enter the lungs (option B), and hydrogen is not involved in this process (option D).
💬 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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