Organic regulations

One of the problems is that the phosphate fertiliser allowed by the organic regulations is rock phosphate, and research in Austria has shown (Lindenthal, et al., 2000) that the application of rock phosphate had virtually no effect on subsequent crop yields. 

The answer is D. Organophosphates react with the active site serine residue of hydrolases such as acetylcholinesterase and form a stable phosphoester modification of that serine that inactivates the enzyme toward substrate. Inhibition of acetylcholinesterase causes overstimulation of the end organs regulated by those nerves. The symptoms manifested by this patient reflect such neurologic effects resulting from the inhalation or skin absorption of the pesticide diazinon. 

Li S., C.A. Wagner, J.A. Freisen, and D.W. Borst (2003). 3-Hydroxy-3-methylglutaryl-coenzyme A reductase in the lobster mandibular organ Regulation by the eyestalk. General and Comparative Endocrinology 134 147-155. 

Relationships between organic regulations and food quality... 

Roche, T. E., and Patel, M. E., eds. (1990) Alpha-Keto Acid Dehydrogenase Complexes Organization, Regulation, and Biomedical Ramifications, Vol. 573, New York Academy of Sciences, New York... 

The two most important principles governing the regulation of biochemical pathways are economy and flexibility. Organisms regulate their metabolic activities to avoid deficiencies or excesses of metabolic products. If a significant change occurs in the environment, such as a shift in the concentration or kinds of nutrients, the organism must quickly adjust its metabolism if it is to survive. 

Medium Organization Regulation/Guideline Level of arsenic... 

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