Cellular Microbiology Essay Example | Topics and Well Written Essays - 2000 words

Cellular Microbiology - Essay Example(Institute of Materials, Great Britain, P. 223) The importance is far reaching, from environmental O2 /CO2 balance to the synthesis of artificial herbicides that act on unwanted herbs by blocking some important steps in this energy producing process. The chlorophyll pigment alone has lead to new avenues for thoughts and research on the importance of photosynthetic processes and has paved the bearing for the synthesis of certain medicinal drugs exploiting its photoprotective mechanisms for preventing light bring on damage of cells. The chlorophyll research has added to the significance of this novel energy yielding life process and has led to the foundation of drug therapy for treatment of tumors, carcinoma and related maladies.In fact the earliest forms of photosynthetic plants principally inhabited the water bodies, especially in the warm mineral rich pools, mainly due to the intense matter of ultraviolet radiation on the land due to the absen ce of the ozone layer. Instead of oxidizing, with a highly reducing nature of environment, principally due to the sparse type O count, the warm pools full of evolving life forms probably utilized the massive energy resource to convert the simple inorganic compounds to complex organic biomolecules, like, purines, pyrimidines, nucleosides, nucleotides, etc, paving the way for the synthesis of nucleic acids and complex proteins and enzymes. (Pearson, P. 10) This definitely potentiated the production of biomolecules required type O production. As the oxygen level in the atmosphere increased slowly with the passage of time, plants reached discover and slowly colonized the lands progressively transforming their semi-aquatic habitats to terrestrial by nature. With the evolution of the earliest microbes that resembled cyanobacteria, algae and lichens till the further differentiated poikilohydric bryophytes evolved. About 25 million long time past, these non vascular bryophytes were soon f ollowed with vascular homioihydric plants capable of maintaining their internal water content at an optimum level irrespective of the external environmental conditions. However originally the origin of these photosynthesizing life forms the challengingly low levels of atmospheric oxygen as hypothesized by the geologists, required an explanation of unknown factors that increased the atmospheric oxygen count at a considerable extent. This unknown process of oxygen accumulation in the atmosphere through an unexplained time gap of hundred million historic period can be associated with a number of presumable theories each of which has its own investigational platform. The red line shows the inferred level of atmospheric oxygen bounded by the constraints obligate by the proxy record of atmospheric oxygen variation over Earths history. The signature of mass-independent sulphur-isotope behaviour sets an upper limit for oxygen levels before 2.45 billion eld ago and a lower limit after th at time. The record of oxidative weathering after 2.45 billion years ago sets a lower limit for oxygen levels at 1% of PAL, whereas an upper limit of 40% of PAL is inferred from the evidence for anoxic oceans during the Proterozoic. The tighter bounds on atmospheric oxygen from 420 million years ago to the present is set by the fairly continuous