कृषि, पशु र वन विज्ञान B.Sc. Forestry प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Forestry प्रवेश
B.Sc. Forestry Entrance · Agriculture, Veterinary & Forestry Entrance
२,४९३ 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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During strenuous exercise, anaerobic respiration in human skeletal muscle produces:
सही उत्तर: क) Lactic acid
When oxygen is short, pyruvate is reduced to lactic acid by lactate dehydrogenase; its build-up causes muscle fatigue.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The net gain of ATP from glycolysis of one glucose molecule (by substrate-level phosphorylation) is:
सही उत्तर: क) 2
Glycolysis makes 4 ATP but uses 2 ATP in the preparatory steps, giving a net gain of 2 ATP (plus 2 NADH).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reaction centre chlorophyll of photosystem II is:
सही उत्तर: ग) P680
Photosystem II has reaction centre P680 (absorption peak 680 nm), while photosystem I has P700.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which plant hormone is known for delaying leaf senescence by promoting nutrient mobilisation?
सही उत्तर: घ) Cytokinin
Cytokinins delay ageing of leaves by maintaining chlorophyll and protein synthesis (Richmond-Lang effect).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bolting, the sudden elongation of internodes just before flowering in rosette plants like cabbage, is induced by:
सही उत्तर: घ) Gibberellin
Gibberellins promote stem elongation and can cause bolting in rosette plants such as cabbage and beet.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Vernalisation refers to:
सही उत्तर: क) Promotion of flowering by exposure to low temperature
Vernalisation is the cold treatment needed by plants such as winter wheat to flower; it prevents early flowering before winter.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The pigment that perceives light in photoperiodism and seed germination is:
सही उत्तर: घ) Phytochrome
Phytochrome exists in red-absorbing (Pr) and far-red-absorbing (Pfr) forms and controls photoperiodic flowering and light-sensitive germination.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which mineral element is a central constituent of the chlorophyll molecule?
सही उत्तर: घ) Magnesium
A magnesium atom sits at the centre of the porphyrin ring of chlorophyll; its deficiency causes chlorosis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Leghaemoglobin in the root nodules of legumes functions to:
सही उत्तर: ग) Protect nitrogenase from oxygen
Leghaemoglobin binds oxygen and keeps its free concentration low, because nitrogenase is inactivated by oxygen.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Translocation of sugars through the phloem is best explained by the:
सही उत्तर: ख) Pressure flow (mass flow) hypothesis
Munch's pressure flow hypothesis says sugar loading at the source raises turgor pressure that pushes sap towards the sink; cohesion-tension explains xylem sap.
💬 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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