विज्ञान – Science MCQ
विज्ञान – डिप्लोमा प्रवेश
Science · CTEVT Diploma Engineering Entrance · ३९९ प्रश्न
३९९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
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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The functional unit of the human kidney is the:
सही उत्तर: घ) Nephron
Each kidney has about a million nephrons that filter blood and form urine. A neuron is the unit of the nervous system and an alveolus is an air sac of the lungs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which blood cells help in the clotting of blood?
सही उत्तर: ख) Platelets
Platelets (thrombocytes) help form a clot at a wound to stop bleeding. White blood cells fight infection and red blood cells carry oxygen.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The father of genetics is:
सही उत्तर: क) Gregor Johann Mendel
Mendel's experiments on pea plants established the basic laws of inheritance. Charles Darwin is known for the theory of evolution by natural selection.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The number of chromosomes in a normal human body cell is:
सही उत्तर: घ) 46
A normal human somatic cell has 46 chromosomes (23 pairs). Human gametes (sperm and egg) have 23 chromosomes each.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The type of cell division that produces gametes (sex cells) is:
सही उत्तर: ग) Meiosis
Meiosis halves the chromosome number so that gametes are haploid. Mitosis produces identical diploid cells for growth and repair.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The green pigment in plants that absorbs light for photosynthesis is:
सही उत्तर: क) Chlorophyll
Chlorophyll in chloroplasts absorbs light energy to make food from CO₂ and water. Haemoglobin is the oxygen-carrying pigment in human red blood cells.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which cell organelle is found in plant cells but not in animal cells?
सही उत्तर: घ) Chloroplast
Chloroplasts contain chlorophyll and carry out photosynthesis, which only plant cells (and some protists) do. Mitochondria are present in both plant and animal cells.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The powerhouse of the cell is the:
सही उत्तर: ग) Mitochondrion
Mitochondria carry out cellular respiration and release energy in the form of ATP. Ribosomes are the sites of protein synthesis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The basic structural and functional unit of life is the:
सही उत्तर: ख) Cell
All living organisms are made of cells, which carry out all life processes. A tissue is a group of similar cells performing a common function.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The main constituent of natural gas (and biogas) is:
सही उत्तर: क) Methane
Methane (CH₄) is the major component of natural gas and biogas. LPG used in cooking cylinders is mainly butane and propane.
💬 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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