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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.
What is lyophobic If the affinity of the dispersed phase to go into or to remain in colloidal dispersion is slight, the dispersed phase is said to be lyophobic (solvent repelli
control of microorganisms by chemical method.
Determine about the Sense of Contrast It is the ability to perceive slight changes in luminance between regions which are not separated by definite borders. This is
what year did virchow state where a cell exists there must have been a pre-existing cell
Q What are the few examples of arthropods? Ants, crabs, cockroaches, shrimps, flies, spiders and scorpions are examples of arthropods.
At 1 AM, an impermeable membrane separates a 1 liter solution of 1M NaCl in the left compartment from a 1 liter solution containing both 1M NaCl and 1M KCl in the right compartment
FLUORIDE It is mostly available in drinking water. Fluoride is essential for the formation of enamel of the teeth. Deficiency of fluoride causes weakness of enamel.
Nervous System of Asteroidea The nervous system of steroids is not ganglionated and is closely related with epidermis. It consists mainly of a circumoral nerve ring surroundin
Define Probability concept of requirements vs risk of deficient and excess intake? Figure best illustrates the concept of a requirement for an essential nutrient. The relations
Define the Absorption of Vitamin A? Vitamin A and carotenoid tend to aggregate with lipids into globules, which then pass into the small intestine. Dietary vitamin A (retinol)
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