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.

    Biology
    The Stratosphere layer of the atmoshphere consists of what among the following the provides protection to our life?
    The ozone layer in the stratosphere absorbs a portion of the radiation from the sun, preventing it from reaching the planet`s surface. Most importantly, it absorbs the portion of UV light called UVB. UVB is a kind of ultraviolet light from the sun (and sun lamps) that has several harmful effects.
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    Biology
    On what cellular structures are genes in eukaryotes carried?
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    Biology
    Most of the energy produced during respiration is stored in
    During cellular respiration, glucose is broken down in the presence of oxygen to produce carbon dioxide and water. The energy released during the reaction is captured by the energy-carrying molecule ATP (adenosine triphosphate).
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    Biology
    Which of the following is a part of the brain that controls thinking?
    By far the largest region of your brain is the forebrain (derived from the developmental prosencephalon), which contains the entire cerebrum and several structures directly nestled within it – the thalamus, hypothalamus, the pineal gland and the limbic system.
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    Biology
    Some preserved traces of living organisms usually on the hardened mud found in the deep layers of the earth are usually known as
    The word fossil comes from the Latin word fossus, meaning “having been dug up.” Fossils are often found in rock formations deep in the earth. Fossilization is the process of remains becoming fossils.
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    Homeostasis
    Which of the following statements about positive feedback and homeostasis is correct?
    Positive feedback causes the stimulus to increase in magnitude which in turn elicits a more exaggerated response.
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    Homeostasis
    As blood glucose concentration rises, what homeostatic response would the body produce?
    Homeostasis tends to result in a response that opposes the detected change. So something would be done to arrest the rise in glucose concentration. Insulin is the hormone that causes cells to absorb glucose from the blood.
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    Biology
    Which of the following helps to translocate a variety of organic and inorganic solutes from the leaves to other parts of the plants?
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    Common Human Diseases
    Beri Beri is caused by the deficiency of which vitamin?

    Beriberi is caused by deficiency of thiamin, more commonly known as vitamin B1. Our body needs thiamin to break down and digest the foods you eat, to keep your metabolism going, and help muscles and nervous system do their jobs effectively. 

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    Life Processes
    Dysfunction in _____ can affect the quality of life while other life processess are still working as usual.
    In order to enjoy a healthy life, all the life processes in our body must function well. A dysfunction in any of these processes can affect the working of other processes and the overall quality of life will be degraded.
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