Read the following questions and answer them by clicking on the links in not more than 200 words
Time: 30 Minutes
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2. Discuss some reasons for the high levels of atmospheric carbon dioxide concentration in India. (GS 3)
3. What do you understand by DNA-based computing? Discuss some of its applications. (GS 3)
DNA based computing uses DNA, biochemistry, and molecular biology hardware instead of traditional computer based technologies. DNA stores all the information and instructions required to build and run a human body. Because of this, the DNA is very suited as a medium for data processing.
Applications:
1 Accurate detection of cancers: By generating a certain output if a cell is expressing too much of a certain gene or has particular sequences of microRNA.
2 Nano Robots: Researchers in Israel used it to create nano robots.
3 Amplification: DNA replication to make many copies of original DNA.
4 Massive Parallel Processing: give them the potential to find tractable solutions to otherwise intractable problems, as well as potentially speeding up large, but otherwise solvable, polynomial time problems.
DNA computing technology is unlikely to replace conventional silicon computers. But its small size and massive parallel processing has certain advantages that conventional doesn’t have, so it can help us solve other problems which are otherwise not possible to solve.
India’s concentration of atmospheric CO2 has reached global average at about 400 ppm. Though there are regional variations but it has high concentration overall. Anything over 350 is considered unsafe. There are various reasons for such high concentration of CO2 like:
1 Lack of CO2 Sinks like forests which absorbs Co2 and store it for great amount of time.
2 Point sources like biomass burning and forest fires.
3 High vehicular emissions at some places like Delhi.
4 Gaseous transport from neighbouring regions based on prevailing weather conditions.
5 Thermal power plants constitutes major part of total energy produced in India. It is source of high CO2 emissions.
6 Industrialisation
Although govt. has taken some measures like banning old diesel vehicle and carbon tax and BS IV norms. But these are rare and inadequate measures for problem this big and having such profound affect. More comprehensive and big measures are required to handle it.
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