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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Golden rice has been genetically engineered to be rich in:
सही उत्तर: क) Beta-carotene (provitamin A)
Golden rice carries genes for beta-carotene synthesis in the grain, giving it a golden colour and helping fight vitamin A deficiency.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The term 'cell' was first used in 1665 by:
सही उत्तर: क) Robert Hooke
Robert Hooke observed dead cork cells under his microscope and called the small compartments 'cells' in his book Micrographia (1665).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following organelles is bounded by a single membrane?
सही उत्तर: क) Lysosome
Lysosomes are bounded by a single unit membrane, whereas mitochondria, chloroplasts and the nucleus have a double membrane envelope.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The '9 + 2' arrangement of microtubules is found in the axoneme of:
सही उत्तर: घ) Eukaryotic cilia and flagella
Eukaryotic cilia and flagella have nine peripheral doublets and two central singlet microtubules; centrioles and basal bodies show a 9 + 0 triplet pattern.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Microtubules of the cytoskeleton are made of the protein:
सही उत्तर: ग) Tubulin
Microtubules are hollow cylinders built from alpha- and beta-tubulin dimers; actin forms microfilaments.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In angiosperms, which living cell of the phloem lacks a nucleus at maturity?
सही उत्तर: क) Sieve tube element
Mature sieve tube elements lose their nucleus; their functions are controlled by the nucleus of the adjacent companion cell.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Glyoxysomes, which convert stored fats into carbohydrates, are found in:
सही उत्तर: क) Germinating oil-rich seeds
Glyoxysomes contain glyoxylate cycle enzymes that convert fatty acids to sugars in germinating fatty seeds such as castor and groundnut.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Detoxification of drugs and poisons in liver cells is mainly carried out by the:
सही उत्तर: ख) Smooth endoplasmic reticulum
The smooth ER of hepatocytes contains enzymes (such as cytochrome P450) that detoxify drugs and poisons; it lacks ribosomes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Biological magnification (biomagnification) of DDT means that its concentration:
सही उत्तर: क) Increases at successive trophic levels
Non-biodegradable DDT accumulates in tissues and its concentration rises at each higher trophic level.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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HIV primarily attacks which cells of the immune system?
सही उत्तर: ख) Helper T cells (CD4+)
HIV binds CD4 receptors on helper T lymphocytes and destroys them, weakening immunity.
💬 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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