Biology

Biology Multiple Choice Questions and Answers (MCQ) PDF: Quizzes & Practice Tests with Answer Key. This section Biology basic concepts, theory and objective tests.

This section covers following topic MCQs: Bioenergetics, biological molecules, cell biology, coordination and control, enzymes, fungi, recyclers kingdom, gaseous exchange, growth and development, kingdom Animalia, kingdom plantae, kingdom prokaryotae, kingdom protoctista, nutrition, reproduction, support and movements, transport biology, variety of life, and homeostasis etc.

    Man and Environment
    Considering ecosystem components, the ones that depend on consumers and cannot make their food are called
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    Reproduction System
    Considering the whorls of plants, the androecium is classified as
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    Coordination and Control
    Sound receptors are present in the
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    Everyday Vitamins
    What disease is caused by a deficiency of Vitamin C (Ascorbic Acid)? (PCS 2001, 2002)
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    Human Body and Reproduction System
    Ovary under stimulus of follicle stimulating hormone (FSH) produces
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    Biological Transport System
    The Heart Day is celebrated worldwide every year on
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    Life Processes
    Exchange of gases in alveoli occurs through:
    Diffusion is the movement of a substance from an area of higher concentration to an area of lower concentration. The air in alveoli contains higher concentration of oxygen. The alveoli are very close to capillaries, which has low oxygen concentration and high carbon dioxide as compared to alveolar air. Oxygen diffuses from the alveoli, into the blood in the capillaries. Similarly, carbon dioxide from the blood moves out of the capillaries into the alveoli.
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    Life Processes
    What is the function of the sac-like structures present at the end of bronchioles?
    Alveoli or air sacs are formed at the end of bronchioles. They provide a surface where the exchange of gases can take place. The walls of the alveoli contain an extensive network of blood vessels. The blood brings carbon dioxide from the rest of the body and releases it into the alveoli. The oxygen in the alveolar air is taken up by the blood in the alveolar blood vessels and is transported to all cells in the body.
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    Biotechnology
    Aspergillus is used to produce
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    Coordination and Control
    The owl cannot see in the day time because of the deficiency of
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