Biology MCQs

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The Actinobacteria are a phylum of Gram-positive bacteria. They can be terrestrial or aquatic. It is known to produce a wide variety of industrially and medically relevant compounds like Antibiotics, etc.

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The formation of Urea takes place in Liver. Urea which is also known as carbamide, is a waste product of many living organisms. It is the major organic component of human urine.

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Genes controls the protein synthesis and heredity. It is the basic physical and functional unit of heredity and are made up of DNA. Some genes act as instructions to make molecules called proteins.

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Thrombin is a naturally occurring enzyme that converts fibrinogen into fibrin, which is an integral step in clot formation. Ca2+ is essential for both activation and action of thrombin.

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In humans, fertilization normally occurs in the fallopian tube. The ovary is the female gonad that contains the eggs. The uterus is the organ that houses the developing embryo. The placenta is the structure that nourishes the embryo.

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Filariasis is a parasitic disease caused by an infection with roundworms of the Filarioidea type. These are spread by blood-feeding black flies and mosquitoes. Meningitis is an inflammation of the protective membranes covering the brain and spinal cord known as the meninges. The inflammation may be caused by infection with viruses, bacteria or other microorganisms. Yellow fever is an acute viral disease. It is caused by the yellow fever virus and is spread by the bite of an infected female mosquito.

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The order Primata includes monkey, gorilla and man and the order Carnivora includes lion, tiger, cat and dog. These two orders are the members of the same class called Mammalia. So, man, monkey and tiger are in the same class.

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Xylem is a type of tissue in vascular plants that transports water and some nutrients from the roots to the leaves. Water is passively transported into the roots and then into the xylem. The forces of cohesion and adhesion cause the water molecules to form a column in the xylem.

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The primary route in which the body eliminates substances is through the kidneys. The main function of the kidney is the excretion of body wastes and harmful chemicals into the urine.

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A low white blood cell count usually is followed by decrease in number of antibodies. When your white blood cell count is low you may not have the usual signs and symptoms when developing an infection such as Redness, Swelling, Pus formation, Cough, Sputum, Nasal drainage and decrease in antibodies.