Biology MCQs

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Rabies disease is transmitted by animal bites and saliva.

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The method that silencing specific mRNA due to the binding of complementary dsRNA is called RNAi.

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Leptospirosis is a bacterial disease caused by corkscrew-shaped bacteria called Leptospira. Signs and symptoms can range from none to mild such as headaches, muscle pains, and fevers; to severe with bleeding from the lungs or meningitis. If the infection causes the person to turn yellow, have kidney failure and bleeding, it is then known as Weil’s disease.

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Calyptrogen is a layer of rapidly dividing cells at the tip of a plant root, from which the root cap is formed. It occurs in grasses and many other plants. The root cap is formed by several layers of cells that envelop the root tip externally. This covering of cells, of which the outermost ones are dead, envelops and protects the growing tip of root.

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Abscisic acid also called plant stress hormone is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.

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Hermaphroditism is a form of sexual reproduction. Hermaphrodite is an organism that has reproductive organs normally associated with both male and female sexes. Hermaphroditic plants—most flowering plants, or angiosperms—are bisexual. Hermaphroditic animals—mostly invertebrates such as worms, moss animals, trematodes, snails, slugs etc are usually parasitic, permanently attached to another animal or plant.

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Blood clotting occurs at the point of injury to control bleeding from blood vessels. The coagulation of the blood is initiated by the blood platelets. They normally start the clotting process when they’re exposed to the air, such as in a cut or wound. Calcium ions are required for the promotion or acceleration of blood clotting pathways. With the help of vitamin K and calcium, fibrinogen (a protein that reacts with platelets) forms a mesh of tiny threads that collects red blood cells, which plug the open blood vessels as it dries. This is a clot.

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Myrmecology is the scientific study of ants, a branch of entomology. The word myrmecology was coined by William Morton Wheeler (1865–1937), although human interest in the life of ants goes back further, with numerous ancient folk references.

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Virology is the branch of science that deals with the study of viruses. It focuses on the following aspects of viruses: their structure, classification and evolution, their ways to infect and exploit host cells for reproduction, their interaction with host organism physiology and immunity, the diseases they cause, and their use in research and therapy.

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Malaria is a life-threatening mosquito-borne blood disease caused by a Plasmodium parasite. It is transmitted to humans through the bite of the Anopheles mosquito. Tuberculosis (TB) is an infectious disease usually caused by the bacterium Mycobacterium tuberculosis. Measles is a highly contagious infection caused by the measles virus.