जीव विज्ञान – Zoology – Zoology MCQ

जीव विज्ञान – Zoology: प्रश्न र उत्तर

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सही: ० / ०

71. The presence of a large number of lymphocytes in the blood is characteristic of which immune response? (a) Humoral immunity involving antibody production. (b) Cell-mediated immunity primarily by T cells. (c) Passive immunity due to maternal transfer of antibodies. (d) Inflammation, characterized by increased vascular permeability.

    क(a) Humoral immunity involving antibody production. ख(b) Cell-mediated immunity primarily by T cells. ग(c) Passive immunity due to maternal transfer of antibodies. घ(d) Inflammation, characterized by increased vascular permeability.
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72. The presence of specialized cells within the mammalian kidney plays a vital role in regulating blood pressure. Which type of cell is MOST directly involved in generating the countercurrent multiplier system, critical for efficient water reabsorption?

    कA. Distal convoluted tubule epithelial cells खB. Proximal convoluted tubule epithelial cells गC. Collecting duct epithelial cells घD. Henle’s loop capillaries
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73. The process of peristalsis in the alimentary canal involves rhythmic contractions that propel food along. Which tissue type primarily mediates this action?

    कA. Simple squamous epithelium खB. Smooth muscle tissue गC. Cardiac muscle tissue घD. Nervous tissue
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74. The movement of water across a semi-permeable membrane from an area of high concentration to low concentration is called:

    कA) Diffusion – the net movement of molecules down their concentration gradient. खB) Active Transport – requiring expenditure of energy for molecular movement. गC) Osmosis - driven by differences in solute concentrations. घD) Facilitated Diffusion - movement across a membrane with the assistance of carrier proteins.
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75. Which of the following processes is responsible for maintaining osmotic balance within animal cells?

    कA) Glycolysis - the breakdown of glucose for energy production. खB) Active Transport – the movement of molecules against their concentration gradient. गC) Filtration – the movement of water across a semi-permeable membrane due to hydrostatic pressure. घD) Secretion - the release of substances from cells.
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76. Which of the following accurately describes the role of the operculum in bony fishes? (a) It is a sensory organ responsible for detecting vibrations in the water. (b) It protects the gills and helps regulate their opening and closing. (c) It primarily functions as a digestive gland, secreting enzymes into the mouth. (d) It is involved in respiration, absorbing oxygen directly from the atmosphere.

    कIt is a sensory organ responsible for detecting vibrations in the water. खIt protects the gills and helps regulate their opening and closing. गIt primarily functions as a digestive gland, secreting enzymes into the mouth. घIt is involved in respiration, absorbing oxygen directly from the atmosphere.
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77. The coordinated contraction and relaxation of cardiac muscle cells is primarily controlled by: (a) The release of adrenaline from the adrenal glands. (b) The action potentials generated by the sinoatrial node and propagated through the conduction system. (c) The direct stimulation of muscle fibers by sensory neurons. (d) The diffusion of oxygen molecules into the muscle cells.

    कThe release of adrenaline from the adrenal glands. खThe action potentials generated by the sinoatrial node and propagated through the conduction system. गThe direct stimulation of muscle fibers by sensory neurons. घThe diffusion of oxygen molecules into the muscle cells.
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78. Consider a typical insect tracheal system for respiration. Which of the following statements BEST explains its key advantage? (a) Tracheal systems efficiently deliver oxygen directly to muscle fibers, bypassing the blood circulation. (b) The tracheal system ensures a constant body temperature throughout the insect’s life. (c) Insects rely solely on tracheal systems for waste removal, eliminating the need for excretory organs. (d) Tracheal systems effectively prevent water loss in terrestrial insects.

    कTracheal systems efficiently deliver oxygen directly to muscle fibers, bypassing the blood circulation. खThe tracheal system ensures a constant body temperature throughout the insect’s life. गInsects rely solely on tracheal systems for waste removal, eliminating the need for excretory organs. घTracheal systems effectively prevent water loss in terrestrial insects.
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79. The specialized cells called chloride cells, also known as ‘stomatocytes’, are found in the gills of teleost fishes. What is their primary function? (a) Gas exchange (oxygen and carbon dioxide). (b) Osmoregulation – maintaining osmotic balance by actively transporting ions. (c) Sensory perception – detecting changes in water pressure. (d) Pigment production – contributing to coloration of the gills.

    कGas exchange (oxygen and carbon dioxide). खOsmoregulation – maintaining osmotic balance by actively transporting ions. गSensory perception – detecting changes in water pressure. घPigment production – contributing to coloration of the gills.
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80. Which of the following statements accurately describes the function of the notochord during embryonic development? (a) It provides skeletal support to the developing embryo. (b) It serves as a hydrostatic skeleton, providing initial structural support and facilitating movement. (c) It is primarily involved in nutrient transport throughout the embryo. (d) It directly contributes to nerve impulse transmission.

    कIt is primarily involved in nutrient transport throughout the embryo. खIt provides skeletal support to the developing embryo. गIt serves as a hydrostatic skeleton, providing initial structural support and facilitating movement. घIt directly contributes to nerve impulse transmission.
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