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 observes a group of organisms undergoing metamorphosis. Which of the following developmental stages would they most likely observe?
सही उत्तर: क) Direct development
Metamorphosis, particularly in insects (like butterflies), involves a drastic change in body form during development. Direct development is the absence of metamorphosis. Gradual development describes changes over time, while protostome development relates to early embryonic divisions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The process of cellular respiration, where glucose is broken down to produce ATP, primarily occurs in which organelle?
सही उत्तर: ख) Mitochondrion
The mitochondrion is the site of cellular respiration due to its folded inner membrane (cristae) that facilitates chemical reactions necessary for ATP production. The other options are involved in different cellular processes like DNA replication, protein synthesis, lipid metabolism and transport respectively.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In humans, the ‘false ribs’ (ribs 8-10) articulate with the ribcage via their superior borders only; they do not directly connect to the sternum. Which structure primarily provides protection for the heart and lungs?
सही उत्तर: ख) Vertebral Column
The rib cage, formed by the ribs articulating with the vertebral column and sternum, offers a protective enclosure for vital organs like the heart and lungs. The sternum is a key component, but it's interaction is through articulation with ribs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A healthy adult individual typically excretes approximately how much liquid (urine) per day?
सही उत्तर: ख) 1500-2500 ml
The average daily urine output for a healthy adult is between 1.5 and 2.5 liters. This volume fluctuates based on hydration levels, diet, and overall health.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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During spermatogenesis, the process of sperm maturation occurs predominantly within which structure?
सही उत्तर: क) Epididymis
The epididymis is responsible for the final stages of sperm development and maturation. The other options are involved in seminal fluid production or transport, but do not play a significant role in spermatogenesis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The primary mode of transmission of *Giardia lamblia*, a common cause of diarrheal illness, is through:
सही उत्तर: क) Ingestion of contaminated water
*Giardia lamblia* primarily spreads through ingestion of contaminated water containing cysts. While direct contact and vector-borne transmission are possibilities for other pathogens, this specific parasite’s main route is fecal-oral.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following ions plays a crucial role in maintaining osmotic balance within animal cells, facilitating nutrient uptake and waste removal?
सही उत्तर: ख) Potassium Ions (K+)
Potassium ions (K+) are vital for maintaining the correct concentration gradient of electrolytes across cell membranes. The other options primarily influence nerve transmission or fluid balance, but don't directly participate in osmotic regulation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Humans become infected with Taenia solium mainly by eating: (A) Raw fish (B) Undercooked pork containing cysts of the parasite. (C) Contaminated fruits and vegetables. (D) Unpasteurized milk.
सही उत्तर: ख) (B) Undercooked pork containing cysts of the parasite.
Taenia solium is a tapeworm species that humans contract through ingestion of undercooked or raw pork containing larval cysts. The larvae then mature in the human intestine.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Cnidoblasts (stinging cells) are found in: (A) Roundworms (B) Jellyfish and corals (C) Flatworms (D) Insects
सही उत्तर: ख) (B) Jellyfish and corals
Cnidoblasts are specialized stinging cells used for prey capture and defense. These are exclusively found in cnidarians like jellyfish and corals. The other options represent entirely different animal phyla.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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During synaptic transmission, neurotransmitters released into the synaptic cleft diffuse across the space and bind to receptors on the postsynaptic neuron. Which of the following correctly describes the *primary* mechanism by which this signal is terminated? (a) Neurotransmitter is immediately reabsorbed back into the presynaptic neuron. (b) The neurotransmitter undergoes a chemical reaction that breaks it down. (c) The neurotransmitter is rapidly transported across the cell membrane. (d) The receptor sites are permanently altered to enhance signal transmission.
सही उत्तर: क) (a) Neurotransmitter is immediately reabsorbed back into the presynaptic neuron.
The most immediate and crucial mechanism for terminating synaptic transmission is reuptake – where the neurotransmitter is actively taken back into the presynaptic neuron. This prevents prolonged stimulation. Option (b) describes degradation, (c) describes transport which occurs later, and (d) describes desensitization.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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