जीव विज्ञान – Biology MCQ
जीव विज्ञान – कृषि/वन प्रवेश
Biology · Agriculture, Veterinary & Forestry Entrance · ८४० प्रश्न
८४० प्रश्न उपलब्ध। मोड छान्नुहोस्:
जीव विज्ञान: 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 of the following organelles contains its own DNA?
सही उत्तर: ग) Chloroplast
Chloroplasts and mitochondria are semi-autonomous organelles with their own circular DNA and 70S ribosomes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which organelle modifies, sorts and packages proteins for secretion?
सही उत्तर: घ) Golgi apparatus
The Golgi apparatus processes proteins received from the rough ER and packages them into vesicles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which organelle is called the 'suicide bag' of the cell?
सही उत्तर: घ) Lysosome
Lysosomes contain hydrolytic enzymes; if they rupture they can digest the cell itself (autolysis).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Ribosomes of prokaryotic cells are of which type?
सही उत्तर: क) 70S
Prokaryotic ribosomes are 70S (50S + 30S subunits), while eukaryotic cytoplasmic ribosomes are 80S.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which cell organelle is the site of protein synthesis?
सही उत्तर: ग) Ribosome
Ribosomes translate mRNA into polypeptide chains, so they are the site of protein synthesis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Deficiency of vitamin C causes:
सही उत्तर: ग) Scurvy
Vitamin C (ascorbic acid) is needed for collagen, and its lack causes bleeding gums (scurvy). Rickets is caused by vitamin D deficiency.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which is the largest gland in the human body?
सही उत्तर: ग) Liver
The liver is the largest gland and also stores glycogen and detoxifies substances. The thyroid is the largest purely endocrine gland.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In adult humans, red blood cells are formed mainly in the:
सही उत्तर: ग) Red bone marrow
Erythropoiesis in adults occurs in red bone marrow of bones like the sternum, ribs and vertebrae. The liver forms RBCs in the foetus, and the spleen destroys old RBCs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bile is produced by the:
सही उत्तर: ग) Liver
Bile is produced by the liver and only stored and concentrated in the gall bladder. It emulsifies fats but contains no digestive enzymes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Apiculture is the rearing of:
सही उत्तर: क) Honey bees
Apiculture (bee-keeping) produces honey and beeswax and helps crop pollination. Rearing silkworms is sericulture.
💬 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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