Science

Zika virus disease is caused by a virus transmitted primarily by Aedes mosquitoes, which bite during the day.Zika virus is a mosquito-borne flavivirus that was first identified in Uganda in 1947 in monkeys. It was later identified in humans in 1952 in Uganda and the United Republic of Tanzania.Symptoms are generally mild and include fever, … Read more

The Mission envisages empowering national academic and R&D institutions spread over the country by installing a vast supercomputing grid comprising of more than 70 high-performance computing facilities.  These supercomputers will also be networked on the National Supercomputing grid over the National Knowledge Network (NKN). The NKN is another programme of the government which connects academic … Read more

Based on his observations on monohybrid crosses Mendel proposed two general rules to consolidate his understanding of inheritance in monohybrid crosses. Today these rules are called the Principles or Laws of Inheritance: the First Law or Law of Dominance and the Second Law or Law of Segregation. Law of Dominance Characters are controlled by discrete … Read more

Universal Health coverage means accessibility of health care to one and all without creating financial hardship. According to WHO, out of pocket expenditure in health sector is 63% whereas the recommended level is 10-15%. There are problems associated with health sector: Expenditure on health is just 2.5% of GDP it has to be near about … Read more

A Cryogenic rocket stage is more efficient and provides more thrust for every kilogram of propellant it burns compared to solid and earth-storable liquid propellant rocket stages. Specific impulse (a measure of the efficiency) achievable with cryogenic propellants (liquid Hydrogen and liquid Oxygen) is much higher compared to earth storable liquid and solid propellants, giving … Read more

Genetic recombination is the process by which two DNA molecules exchange genetic information, resulting in the production of a new combination of alleles. In eukaryotes, genetic recombination during meiosis can lead to a novel set of genetic information that can be passed on to progeny. Most recombination is naturally occurring. During meiosis in eukaryotes, genetic … Read more

Radiocarbon dating is a method that provides objective age estimates for carbon-based materials that originated from living organisms. An age could be estimated by measuring the amount of carbon-14 present in the sample and comparing this against an internationally used reference standard. Radiocarbon, or carbon 14, is an isotope of the element carbon that is unstable … Read more

Cell cycle, the ordered sequence of events that occur in a cell in preparation for cell division. The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA(synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage). The stages G1, … Read more

While proposing the double helical structure for DNA, Watson and Crick had immediately proposed a scheme for replication of DNA. The scheme suggested that the two strands would separate and act as a template for the synthesis of new complementary strands. After the completion of replication, each DNA molecule would have one parental and one … Read more

  Metallic Non Metallic Metallic mineralscontain metal in raw form. Nonmetallic donot contain metals. These metals aregenerally associated withigenous rocks. These metals aregenerallyassociated with sedimentary rocks. They are usually hard and have shine of their own. They are notusually hard and have no shine oftheir own. Examples: iron,copper, bauxite, lead and tin. Examples: salt,coal, mica,gypsum, … Read more