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Dengue Introduction
The dengue viruses are parts of the genus Flavivirus in the family Flaviviridae . Onwards with the dengue virus, this genus also contains a number of other viruses transmitted by mosquitoes and ticks that are responsible for human diseases. Flavivirus includes the yellow fever, West Nile, Japanese encephalitis, and tick-borne encephalitis viruses. The dengue virus is a tiny structure that can only replicate inside a host organism. The four almost related dengue viruses — DEN-1, DEN-2, DEN-3, and DEN-4 — are found in the same regions of the world. The dengue virus is an approximately spherical structure composed of the viral genome and capsid proteins surrounded by an envelope and a shell of proteins. Subsequently infecting a host cell, the dengue virus hijacks the host cell's machinery to replicate the viral RNA genome and viral proteins. After maturing, the newly amalgamated dengue viruses are released and go on to infect other host cells. Dengue fe...
Revision of Carbon and Its Compounds F
4. Carbon and Its Compounds Specific Properties of Ethanoic Acid Soaps and Detergents Uniqueness of Carbon Formation of Covalent Bonds Difference Between Ionic and Covalent Bonds Electron Dot Structure Saturated and Unsaturated Carbon Compounds Chains, Branches and Rings Homologous Series of Carbon Compounds Nomenclature of Carbon Compounds Specific Properties of Ethanol General Properties of Carbon Compounds Lesson: Carbon and its Compounds Question: 1 Ethane, with the molecular formula C 2 H 6 has: (a) 6 covalent bonds. (b) 7 covalent bonds. (c) 8 covalent bonds. (d) 9 covalent bonds. Solution: b Question:2 Butanone is a four-carbon compound with the functional group: (a) Carboxylic acid (b) Aldehyde (c) Ketone (d) Alcohol Solution: c Question:3 While cooking, if the bottom of the vessel is getting blackened on the o...
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