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Denitrification - Nutrient Cycles
Nitrates are readily leached from the soil and also lost through denitrification the process by which molecular or gaseous nitrogen (N2) as well as nitrous oxide (NO) 'and nitric oxide (N2O) and nitrogen dioxide (NO2) are formed from NO-3 by bacteria (such as pseudomonas) and fungi. They use the nitrate as a source of oxygen in the presence of glucose and phosphate. Denitrifing bacteria prefer anaerobic or partially aerobic habitats such as estuaries, bogs, lake bottoms and water-logged soils. The bacteria reduce the nitrates to nitrites which are finally converted to free nitrogen.
Depleted (Vulnerable) Species These are the species whose numbers are greatly reduced from those of the recent past, and they are continuing to decrease. It is the continued d
What is the futile cycle The futile cycle is avoided because covalent modification, by phosphorylation, has opposite effects on the enzymes concerned with the synthesis a
In a plasma membrane, which of the below provides a general barrier to the movement of molecules? a) Lipids b) Proteins c) Carbohydrates d) all of these Answer: a
Wheel organ of amphioxus.
DB is a standard abbreviation used for the quantitative expression of: 1. the density of bacteria in a medium 2. a particular pollutant 3. the dominant Bacillus in a cultu
How do mineral salts participate in enzymatic activity? Many mineral salts are cofactors of enzymes. i.e., they are substances without which enzymes do not work.
what is bowman''s capsule?
Assume for this question that we are discussing a rare human disorder. Describe as detailed as possible the characteristics of this disorder if it is: autosomal dominant autosomal
Stage I Surgical phase Implant placed in the maxilla or mandible After 7 days: - Sutures resorbs or are removed - Patient may be allowed to wear his/her former denture
What happens to transcription at the lac operon when lactose is absent and why? What happens to transcription at the lac operon when lactose is present and why? What happens
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