जीव विज्ञान – Zoology – Zoology MCQ
जीव विज्ञान – Zoology – CEE प्रवेश
Zoology · Medical Entrance (CEE) – Physics, Chemistry, Biology & MAT · ४०८ प्रश्न
४०८ प्रश्न उपलब्ध। मोड छान्नुहोस्:
जीव विज्ञान – Zoology: 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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A researcher is studying the movement of water in a sea anemone. Through which structure does the anemone primarily expel waste products and regulate its osmotic balance?
सही उत्तर: ख) B) Pedal disc.
Option B is correct. The pedal disc of a sea anemone contains specialized cells that function as an exonephros – this structure actively removes waste products and regulates water balance by filtration and excretion. Tentacles are used for feeding; cnidocytes (stinging cells) are involved in defense; and the oral groove is where food enters.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The presence of a mantle cavity, a large space surrounding the visceral organs, is most characteristic of which phylum?
सही उत्तर: ख) B) Mollusca.
Option B is correct. The mantle cavity is a key feature distinguishing mollusks (e.g., snails, clams, squid) – it facilitates respiration and locomotion. Annelids have segmented bodies; Nematodes are roundworms, and Platyhelminthes are flatworms lacking such a cavity.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following best describes the function of the glomerulus within a nephron?
सही उत्तर: ख) B) Filtration of blood plasma, forming filtrate.
Option B is correct. The glomerulus is a network of capillaries within Bowman's capsule, where hydrostatic pressure forces water and small solutes from the blood into the filtrate – this is the primary filtration process in urine formation. Option A describes nutrient absorption; C relates to hormone secretion; and D to erythropoiesis (red blood cell production).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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During embryonic development, the formation of the notochord, which provides skeletal support and signals for further development, occurs primarily in which phylum?
सही उत्तर: क) A) Chordata.
Option A is correct. The notochord is a defining characteristic of chordates (including vertebrates) and plays a fundamental role in embryonic development. Option B describes arthropods, C molluscs, and D echinoderms – all representing distinct phyla with different developmental pathways.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of metamorphosis in amphibians like frogs involves transformation from an aquatic larval stage to a terrestrial adult stage. Which of the following accurately describes the key structural changes during this transition?
सही उत्तर: क) A) Loss of gills and development of lungs; increased limb motility and reduction in tail size.
Option A is correct. Metamorphosis in frogs involves the loss of gills and the development of lungs for breathing air, along with changes in limb structure (increased motility) and a reduction in tail size – all crucial adaptations for life on land. Option B is incorrect as it describes camouflage adaptation related to skin pigment, not the fundamental structural changes during amphibian metamorphosis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The presence of ketonuria (ketone bodies in urine) is most strongly indicative of: (a) Dehydration (b) Excessive protein intake (c) Insufficient carbohydrate intake or starvation (d) Kidney damage
सही उत्तर: घ) (d) Kidney damage
Ketonuria is a characteristic sign of metabolic stress, primarily occurring when the body lacks sufficient glucose for energy and begins to break down fat instead. This results in ketone bodies being produced and excreted in urine. Option (a) relates to dehydration but doesn't cause ketonuria; (b) increases protein levels but not ketones; and (d) is a general symptom of kidney problems but not specifically linked to ketone production.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which blood group is most likely to have plasma containing anti-B antibodies? (a) Blood Group A (b) Blood Group B (c) Blood Group AB (d) Blood Group O
सही उत्तर: घ) (d) Blood Group O
Blood group AB individuals have both A and B antigens on their red blood cells, thus eliciting an immune response against both anti-A and anti-B antibodies in the plasma. Therefore, plasma of AB blood group contains both anti-A and anti-B antibodies. Options (a), (b) and (d) are incorrect because they have only one type of antibody.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The ‘lub’ sound heard during a heartbeat represents: (a) The forceful contraction of the ventricles. (b) The opening of the mitral valve. (c) The closing of the tricuspid valve. (d) The relaxation of the atria.
सही उत्तर: ग) (c) The closing of the tricuspid valve.
The ‘lub’ sound is caused by the closure of the heart valves, specifically the tricuspid valve. This creates a sharp, distinct sound. Option (a) describes the ‘dub’ sound created by ventricular contraction, and (c) and (d) relate to other phases and valves.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following statements accurately describes the role of mitochondria in eukaryotic cells? (a) They are primarily involved in protein synthesis. (b) They generate ATP through cellular respiration. (c) They store genetic information for cell division. (d) They provide structural support to the cell.
सही उत्तर: ख) (b) They generate ATP through cellular respiration.
Mitochondria are known as the ‘powerhouses’ of the cell because they carry out cellular respiration, a process that converts glucose and oxygen into ATP (adenosine triphosphate), the primary energy currency for cells. Option (a) is the function of ribosomes, (c) describes the role of the nucleus, and (d) is the role of the cytoskeleton.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The primary function of goblet cells in the human respiratory tract is to: (a) Transport oxygen throughout the body (b) Secrete mucus to trap pathogens and debris (c) Absorb nutrients from inhaled air (d) Stimulate cilia movement for clearing airways
सही उत्तर: ख) (b) Secrete mucus to trap pathogens and debris
Goblet cells are specialized epithelial cells that secrete mucin, a glycoprotein which forms mucus. This mucus traps inhaled particles like dust and microorganisms, protecting the respiratory tract. Option (a) describes the function of capillaries, (c) relates to absorption in the small intestine, and (d) describes the function of cilia.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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