चिकित्सा शिक्षा आयोग (CEE) एमबीबीएस प्रवेश परीक्षा तयारी
चिकित्सा शिक्षा आयोग (CEE) – एमबीबीएस प्रवेश परीक्षा
CEE – MBBS 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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Glycolysis takes place in the:
सही उत्तर: घ) Cytoplasm
Glycolysis (EMP pathway) breaks glucose into two pyruvate molecules in the cytoplasm. The Krebs cycle occurs in the mitochondrial matrix.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Photorespiration involves the cooperation of which three organelles?
सही उत्तर: ग) Chloroplast, peroxisome and mitochondrion
In photorespiration, glycolate formed in chloroplasts is metabolised in peroxisomes and mitochondria, releasing CO2. It is a wasteful process and is minimal in C4 plants.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The most abundant enzyme on Earth is:
सही उत्तर: क) RuBisCO
RuBisCO (ribulose bisphosphate carboxylase-oxygenase) is abundant in chloroplasts of all green plants. Its oxygenase activity causes photorespiration.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In C4 plants, the primary CO2 acceptor in mesophyll cells is:
सही उत्तर: ख) Phosphoenolpyruvate (PEP)
PEP, a 3-carbon compound, accepts CO2 in mesophyll cells via PEP carboxylase, forming oxaloacetic acid. RuBP is the CO2 acceptor of the Calvin cycle.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction centre of Photosystem I is:
सही उत्तर: घ) P700
PS I has a reaction centre absorbing maximally at 700 nm (P700). P680 is the reaction centre of PS II.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The oxygen released during photosynthesis comes from:
सही उत्तर: घ) Water
Experiments with isotopic oxygen (O-18) showed that O2 evolved comes from the photolysis of water. CO2 oxygen ends up in carbohydrate and water.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The splitting of water (photolysis) in photosystem II is associated with:
सही उत्तर: क) Manganese
The oxygen-evolving complex of PS II contains manganese, along with calcium and chloride. Molybdenum is associated with nitrogen metabolism.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which element is a constituent of the chlorophyll molecule?
सही उत्तर: ख) Magnesium
Magnesium is at the centre of the porphyrin ring of chlorophyll. Iron is needed for chlorophyll synthesis but is not part of the molecule.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which micronutrient is a component of the enzyme nitrogenase?
सही उत्तर: ख) Molybdenum
Molybdenum (along with iron) is a component of nitrogenase and also of nitrate reductase. Zinc is needed for auxin synthesis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The pink colour of root nodules of leguminous plants is due to:
सही उत्तर: ग) Leghaemoglobin
Leghaemoglobin binds oxygen and protects nitrogenase from inactivation. Anthocyanins give red-purple colours to flowers and fruits, not root nodules.
💬 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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