General Science Questions (MCQs) for Competitive Examinations

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The glomerulus functions as an excretory organ in hemichordates. Soluble wastes are collected from the blood by the glomerulus, lying within the proboscis cavity, and excreted from that cavity through a dorsal pore (an opening on the upper side) to the outside.

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DNA does not directly control the formation of a polypeptide. However, it forms an intermediate template mRNA molecule, which directs the synthesis of polypeptide. The DNA can be compared to a master copy that is carefully preserved in the nucleus and used for preparing working copies in the form of mRNA molecules.

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The uterus or womb is a major female hormone responsive reproductive sex organ of most mammals including humans. It is within the uterus that the fetus develops during gestation, usually developing completely in placental mammals such as humans and partially in marsupials such as kangaroos and opossums.

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As per the report of WWF the ten most endangered rivers emerge as: the Salween, La Plata, Danube, Rio Grande, Ganges, Murray-Darling, Indus, Nile, Yangtze and Mekong.

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Ultrastrong spider silk is one of the toughest natural fibres known in nature. The light, flexible fibre is five times stronger by weight than high-grade steel and extremely stretchy, enlarging to snag incoming insects and other prey.

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Odontology is the study of the structure, development, and abnormalities of the teeth. Forensic dentistry or forensic odontology is the proper handling, examination and evaluation of dental evidence, which can be presented in the interest of justice.

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The nucleoplasm is the liquid or semi-liquid substance of the nucleus filling the space around the DNA and the nucleoli. It is a type of protoplasm that is made up mostly of water, a mixture of various molecules, and dissolved ions. It is completely enclosed within the nuclear membrane or nuclear envelope.

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DOTS (Directly Observed Treatment, Short Course), also known as TB-DOTS, is the name given to the tuberculosis control strategy recommended by the World Health Organization. It is the best curative method for treatment of tuberculosis being highly efficient and cost-effective strategy.

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In biology, a pathogen or germ is anything that can produce disease. Typically, the term is used to describe an infectious agent such as a virus, bacterium, protozoa, prion, a fungus, or other microorganism. The scientific study of pathogens is called Pathology.

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Both male and female mosquitoes eat the same things—nectar, plant sap, or honeydew (a sticky substance excreted by aphids)—for energy. But only female mosquitoes imbibe a blood meal. The females need the protein in blood platelets to develop eggs. Male mosquitoes don’t have specific mouthparts to pierce skin and access blood vessels.