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.

    Life Processes
    Which of these is the correct sequence in the process of digestion?
    Digestion process involves the following steps: →Ingestion or the process in which food is taken in the body. →Digestion or the process in which complex food particles are broken down into simpler substances. →Absorption or the process in which the digested food is absorbed into the body. →The byproducts of metabolic reactions which are not useful for the body are eliminated through the process called excretion.
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    Cell Cycle
    About how many trillion somatic cells are present in a human body?
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    Cell Cycle
    DNA is organized in cell in small structures called:
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    Biology
    Which of the following processes denotes water soluble inorganic nutrients go down into the soil horizon and gets precipitated as unavailable salts?
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    Reproduction System
    In which of the following organisms does budding take place?
    Hydra and yeast can reproduce by budding. Amoeba reproduces by fission. Lizard does not reproduce by asexual reproduction. Spirogyra reproduces by fragmentation.
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    Biology
    Which of the following pigments gives green colour to the leaves?
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    Cell Cycle
    How many times a normal mammalian cell divides before it ages and dies?
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    Homeostasis
    Which of the following is a correct definition of “negative feedback”?
    When an action is taken to cause the stimulus to be reduced, the feedback is termed “negative”.
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    Biology
    The pollutant which is responsible for ozone holes is
    Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).
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    Biology
    Which of the following vitamins is also known as Thiamine?
    Thiamin (thiamine), or vitamin B1, is a water-soluble vitamin found naturally in some foods, added to foods, and sold as a supplement.
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