Microbiology

1. Nitrogen is needed for the synthesis of such molecules as amino acids, DNA, RNA and ATP 2. Briefly describe the process of ammonification. What happens to the ammonium hydroxide that is released into the s fossil oil. Ammonification is a stage of the normality cycle where which the organically abjure atomic morsel 7 of microbial, plant, and animal biomass is recycled after their dying and liberated as ammonium ions (NH4). It is mediated by some(prenominal) soil microorganisms called ammonifying bacteria on a lower stratum aerobic conditions. It involves the input of the following enzymes: Gln Synthetase, Glu 2-oxoglutarate aminotransferase, Glu Dehydrogenase. CH3 CHNH2 COOH + 1/2 O2 -----------------> C H3COCOOH      +      NH3    Alanine                                    deaminase         Pyruvic acid               ammonia The ammonium is taken up by plants as it is an important sour ce of nitrogen for many species. around ammonium is converted to nitrites and nitrates by bacteria. 3. What is the purpose of adding zinc 4.Name 2 anaerobiotic environments where you would expect denitrification to take place. (1) denitrification only takes place in anaerobic environments where oxygen consumption exceeds the oxygen supply and where capable quantities of nitrate are present.

These environments may include certain soils[15] and groundwater,[16] wetlands, oil reservoirs,[17] sick ventilated corners of the ocean, and in seafloor sediments. 5. Nitrogenase is inactivated in the presenc e of oxygen, so nitrogen fixing bacteria hav! e evolved a number of divers(prenominal) mechanisms to protect this enzyme. Azotobacters have very high respiration rates, and this uses up the oxygen before it can enter the bacteria to impose on _or_ oppress the nitrogenase. As a result, azotobacters grow as a pellicle or fine film on the ascend of the medium 6. 7. Old cells take to the woods to form thick-walled, optically refractile cysts, which have capsules consisting largely of alginates and other(a) polysaccharides, enhancing...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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