कृषि, पशु र वन विज्ञान B.Sc. Ag र B.V.Sc. & A.H. प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Ag र B.V.Sc. & A.H. प्रवेश
B.Sc. Ag & B.V.Sc. Entrance · Agriculture, Veterinary & Forestry Entrance
२,४४१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कृषि, पशु र वन विज्ञान 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 'bakanae' (foolish seedling) disease of rice led to the discovery of:
सही उत्तर: ख) Gibberellin
Rice seedlings infected by the fungus Gibberella fujikuroi grew abnormally tall because the fungus produced gibberellin. Auxin was discovered from studies of coleoptile phototropism.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The gaseous plant hormone that promotes fruit ripening is:
सही उत्तर: ग) Ethylene
Ethylene is the only gaseous plant hormone and hastens ripening of fruits such as banana and mango. Auxin is commonly used for rooting of cuttings instead.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which plant hormone causes closure of stomata during water stress?
सही उत्तर: ख) Abscisic acid
Abscisic acid (ABA) is called the stress hormone; it causes stomatal closure and promotes dormancy. Cytokinins generally act opposite to ABA.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The plant hormone that mainly promotes cell division is:
सही उत्तर: ख) Cytokinin
Cytokinins (e.g. kinetin, zeatin) promote cytokinesis and are used in tissue culture with auxin. Gibberellins mainly cause stem elongation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Photolysis of water during photosynthesis is associated with:
सही उत्तर: घ) Photosystem II
The oxygen-evolving complex of photosystem II splits water, releasing O2, protons and electrons. Photosystem I receives electrons later and reduces NADP+.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The final electron acceptor in aerobic respiration is:
सही उत्तर: ख) Oxygen
At the end of the electron transport chain, electrons are accepted by molecular oxygen, which forms water. NAD+ and FAD are electron carriers that pass electrons on, not final acceptors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Krebs cycle occurs in the:
सही उत्तर: क) Mitochondrial matrix
The enzymes of the Krebs (citric acid) cycle are located in the mitochondrial matrix. The electron transport chain is on the inner mitochondrial membrane.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The end product of glycolysis is:
सही उत्तर: घ) Pyruvic acid
Glycolysis splits one glucose into two molecules of pyruvic acid. Acetyl CoA is formed later when pyruvate is oxidatively decarboxylated in the mitochondria.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Kranz anatomy is characteristic of the leaves of:
सही उत्तर: ख) Maize
Kranz anatomy (bundle sheath cells with large chloroplasts surrounding vascular bundles) is a feature of C4 plants such as maize and sugarcane. Wheat and rice are C3 plants.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The first stable product of CO2 fixation in C4 plants is:
सही उत्तर: घ) Oxaloacetic acid
In C4 plants PEP combines with CO2 to form the 4-carbon oxaloacetic acid (OAA). 3-PGA is the first stable product in C3 plants.
💬 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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