FSC Biology MCQs Part 1 bio Part 2 HSSC Pre Medical Book Questions first year and second-year bio mcqs

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Chemically auxins are
A. Indole propionic acid. B. Indole carboxylic acid.
C. Indole acetaldehyde D. Indole acetic acid.
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[explanation]d[/explanation]
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Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering:
A. Gibberellins B. Cytokinins
C. Auxins D. Ethene.
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[explanation]A[/explanation]
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Which type of the receptors are present in the ear?
A. Chemoreceptors B. Mechanoreceptors
C. Photoreceptors D. Thermoreceptors
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[explanation]b[/explanation]
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Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips?
A. Hair end organs B. Meissner’s Corpuscles.
C. Pacinian corpuscles. D. None of these.
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[explanation]b[/explanation]
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Which of the following statement about neuron is incorrect?
A. They not only conduct impulses but also generate them. B. They are not the only cellular component of nervous system.
C. They may show limited regenerative capabilities. D. Like all the living cell, when they mature and divide to form similar cells.
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[explanation]d[/explanation]
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Chlorosis, i.e., yellowish hue on the leaves results from
A. Accumulation of toxic waste products in leaves. B. Deficiency of chlorophyll.
C. Short supplies of mineral nutrients in the soil. D. All of these
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[explanation]d[/explanation]
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Maintenance of normal resting potential via movement of K+ inside the cell and na+ out is a/an _______ process.
A. Active B. Passive
C. Diffusional D. None of these.
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[explanation]A[/explanation]
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Na+ -K+ ATPase pump is important for:
A. Maintenance of resting potential. B. Massive out flux of K+ after depolarization.
C. Recovery of resting potential. D. Conversion of resting potential into action potential.
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[explanation]c[/explanation]
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Co-ordination results in
A. Regulation of body functions B. Organization of body functions
C. Integration of body functions D. All of these
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[explanation]d[/explanation]
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Co-ordination in man is brought about by
A. Nervous system B. Endocrine system
C. Both of these D. none of these.
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[explanation]c[/explanation]
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