Biology MCQs

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Bacteriophage, also called phage or bacterial virus, any of a group of viruses that infect bacteria. Bacteriophages were discovered independently by Frederick W. Twort in Great Britain in 1915. It is a virus which parasitizes a bacterium by infecting it and reproducing inside it. Bacteriophages are much used in genetic research.

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The stapedius muscle is the smallest skeletal muscle in the entire body that is located in the middle ear. Specifically, the stapedius muscle originates from a cone-shaped structure in the tympanic cavity of each ear and then extends to the stapes bone.

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Typhoid fever is a systemic infection caused by bacteria Salmonella typhi, usually through ingestion of contaminated food or water. The acute illness is characterized by prolonged fever, headache, nausea, loss of appetite, and constipation or sometimes diarrhoea.

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A noncommunicable disease (NCD) is a medical condition or disease that is by definition non-infectious and non-transmissible among people. Eg. Cancer which is also called malignancy, is an abnormal growth of cells.

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Reserpine drug is derived from the roots of certain species of the tropical plants. It is derived from the powdered whole root of the Indian shrub Rauwolfia serpentine. It can be used to treat snakebites, insomnia, hypertension (high blood pressure), and insanity.

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Camels store fat in their humps, not water. As a camel goes without food, its hump begins to shrink. Until recently, many scientists believed that camels could store water in one of their three stomachs. Very thirsty camels can drink up to 100 liters of water during a single visit to the well.

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Neem has been patented by India for its use as biofertilizer, biopesticide and antifertility compound as contraceptive. Neem is a natural herb that comes from the neem tree, other names for which include Azadirachta indica and Indian lilac. The extract comes from the seeds of the tree and has many different traditional uses. Neem is known for its pesticidal and insecticidal properties, but people also use it in hair and dental products.

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Stones are typically classified by their location: nephrolithiasis (in the kidney), ureterolithiasis (in the ureter), cystolithiasis (in the bladder), or by what they are made of (calcium oxalate, uric acid, struvite, cystine).

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A capsid is the protein shell of a type of virus, which encloses its genetic material.

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Endocytosis is the process in which the ingestion of material by the cells is carried out through the plasma membrane.