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Enzyme Synthesis
Nitrate assimilating system in general is known to show increase in nitrate uptake system and nitrate reductase system in the presence of nitrate. In other words, nitrate assimilatory system is induced by the presence of nitrate. Similarly, cells or organisme assimilating NH3 as nitrogen source show lack of nitrate assimilatory system. Such control of nitrate is called repression control. Thus nitrate is an inducer while ammonia is repressor of nitrate assimilatory system. Red light is known to enhance synthesis of nitrate assimilatory system and this light effect is mediated by well-known photomorphogenic pigment called phytochrome.
Define Surgical Procedures for Cancer Patient Major resection of the small bowel is not common. Resection of the ileum leads to certain physiological and nutritional problems.
Q. Why doesn't the food enter the trachea instead of going to the esophagus? When food is swallowed the swallow reflex is activated and the larynx closes and elevates to avoid
The risk for IE among IV drug abusers, 2 to 5 per cent per patient- year, is estimated to be several fold greater than that of patients with rheumatic heart disease or prosthetic v
What is meant by binomial nomenclature and what are its basic rules? Scientific nomenclature of a species must have, at least, two names: one that classifies it as genus and th
What are the typical vegetation and the typical fauna of the temperate forests? In the temperate forest deciduous trees predominate. Various Mammals are found in great number,
Polychaete, Mollusca and Echinodermata Polychaete and Mollusca The polychaetes have a trochophore larva. A common trochophore larva is top shaped bearing a tuft of cilia
Hom o sapiens sapiens (MODER N MAN) - Developed from Cro-Magnon about 10,000 years ago after last glacial period in the regions of Caspian and Mediterranean seas.
Pneumothorax Entry of air in the pleural cavity is called pneumothorax. It may be spontaneous, result of penetrating or non-penetrating injuries. Closed Pneumothorax
Meselson and Stahl demonstrated that DNA replication is a semi-conservative process. Which of the following best explains the definition of "semi-conservative"? A. The two stra
Inorganic Nitrogen and Sulphur Metabolism Productivity in agriculture, forestry and other ecosystems is basically limited by the availability of nitrogen nutrients like nitrat
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