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Saturday, March 22, 2008

DNA 3' & 5'

5' is the the position of cabon exposed and one end and 3' the the position of cabon exposed. 5 & 3 represents the position of carbon of the nucleotide.

Bio mass

Biomass, in the energy production industry refers to living and recently living biological material which can be used as fuel or for industrial production. Most commonly biomass refers to plant matter grown for use as biofuel, but also includes plant or animal matter used for production of fibres, chemicals or heat. Biomass may also include biodegradable wastes that can be burnt as fuel. It excludes organic material which has been transformed by geological processes into substances such as coal or petroleum. It is usually measured by dry weight.The term biomass is especially useful for plants, where some internal structures may not always be considered living tissue, such as the wood (secondary xylem) of a tree.Biomass is grown from several plants, including switchgrass, hemp, corn, poplar, willow and sugarcane. The particular plant used is usually not very important to the end products, but it does affect the processing of the raw material. Production of biomass is a growing industry as interest in sustainable fuel sources is growing.Though biomass is a renewable fuel, its use can still contribute to global warming. This happens when the natural carbon equilibrium is disturbed; for example by deforestation or urbanization of green sites.Biomass is part of the carbon cycle. Carbon from the atmosphere is converted into biological matter by photosynthesis. On decay or combustion the carbon goes back into the atmosphere. This happens over a relatively short timescale and plant matter used as a fuel can be constantly replaced by planting for new growth. Therefore a reasonably stable level of atmospheric carbon results from its use as a fuel.Although fossil fuels have their origin in ancient biomass, they are not considered biomass by the generally accepted definition because they contain carbon that has been 'out' of the carbon cycle for a very long time. Their combustion therefore disturbs the carbon dioxide content in the atmosphere.Other uses of biomass, besides fuel:1)Building materials 2)Biodegradable plastics and paper (using cellulose fibres) Plastics from biomass, like some recently developed to dissolve in seawater, are made the same way as petroleum-based plastics, are actually cheaper to manufacture and meet or exceed most performance standards. But they lack the same water resistance or longevity as conventional plastics

Protien Synthesis

Protien Syntesis involves 2 Major Events they are1 Transcription: It is the transcribing of Genetic material (DNA/RNA) into an mRNA(messenger RNA)2 Translation: In this mRNA is translated into Protiens.Both Transcription & Translation involves 3 Major Processes1 Initiaton2 elongation3 TerminationAfter Transcription mRNA is formed which is immature,it undergoes Slicing and Spilicing and post transcriptional modification.The modified mRNA comes out of nucleus and passes through Ribosome there it is translated and Protien is formed.Note: In all these events Various kinds of enzyme, Transcriptional & translational factors and other Proteins are involved

Why Phosynthesis is so important?

Photosynthesis is so imp. because they are the primary producers of energy for the whole organisms in the ecosystem.

Survival of the Fittest

The theory of Darwin " the Survival of the Fittest", while coming to the case of survival the best suited or best adapted will survive, this is known as survival of the fittest.Exception are seen in case of Honey Bees(Altruism) and in case of Ants


Can one consider varying the distance between the light source and the plant as a change in the intensity of light (in order to determine the rate of photosynthesis)??
Yes, Intensity of light plays a imp role in controlling the rate of photosynthesis.