APPSC Prelims and Mains Notes, APPSC Test Series
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
Applications of tissue culture Rapid Clonal Propagation Join Our Telegram Channel A clone is a group of individuals or cells derived from a single parent individual or cell through asexual reproduction. All the cells in callus or suspension culture are derived from a single explants by mitotic division. Therefore, all plantlets regenerated from a callus/suspension … Read more
Application of radioactivity: • Health: 1. Found extensive use in diagnosis and therapy eg. Phosphorous-32 is used to identify the cancerous cell. As cancer cell absorb more phosphorous, Iodine 131 is employ to determine cardiac output, plasma volume and fat metabolism and particularly to measure the activity of thyroid gland. 2. To treat cancer cells: … Read more
Petroleum coke or pet coke, is a solid carbon rich(90% carbon and 3% to 6% sulfur) material derivedfrom oil refining. It is categorized as a “bottom of the barrel” fuel.It is a dirtier alternative to coal and emits 11% moregreenhouse gases than coal and nearly 17 timesmore sulphur than coal. Join Our Telegram Channel Petcoke … Read more
Biofuels are the fuel generated from the biomass. They are the renewable source of energy. The different generation of biofuel are tabulated below: Subscribe on YouTube 1st Generation biofuel · Produced directly from the crop · Crop such as wheat and sugar are used · Stable, competitive with fossil fuel · Food vs Fuel criticism … Read more
World economy is expecting a slow down due to the spread of COVID-19 in around 115 countries. WHO has recently termed the COVID-19 pandemic and US has termed it as emergency situation. As a result of the virus spread global economy is facing serious situations like: Join Our Telegram Channel Travel and trade have been … Read more
Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields. Properties of electromagnetic waves: Subscribe on YouTube EM waves are composed of oscillating electric and magnetic fields at … Read more
Join Our Telegram Channel Implantations of nanotransmitters and nanosensors within individuals have opened gates for monitoring and treating them at the microscopic level with the use of nanodevices. But this crosses traditional bounderies of care in the hospitals as persons can get the treatment done while siting in their homes . Pateients at home … Read more
India’s Polar Satellite Launch Vehicle (PSLV-C45) successfully launched EMISAT and 28 international customer satellites from Satish Dhawan Space Centre (SDSC) SHAR in Sriharikota. This flight marked the first mission of PSLV-QL, a new variant of PSLV with four strap-on motors. EMISAT is a satellite built around ISRO’s Mini Satellite-2 bus weighing about 436 kg. The … Read more
The history of medicinal plants is intimately connected with the history of botany. Primitive man, in constant terror of diseases, lived at the mercy of nature. From the earliest times, tribal priests and medicine men (witch doctors) used various plants, minerals and animal organs, usually in association with strange rituals and incantation, to drive out … Read more