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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 the characteristics that are seen in Rickets? The following characteristics are seen in fully developed cases of rickets: 1) In case of young infants, delayed closure
Biological Oxygen Demand - Effect on Water Bodies Addition of biodegradable matter exerts demand on oxygen of the water body. The demand of oxygen is directly related to incre
Endosperm with Lateral Haustoria In Monochoria, in which the endosperm development is of helobial type, the haustorium is neither chalazal nor micropylar but lateral. The cha
Explain Fontan Operation ? The original Fontan operation was done in a case where classical Glenn operation had been done (end-Lo-end anastomosis of superior vena cava and lig
Sterility in Angiosperms Sterility in angiosperms may arise due to several causes. Either the anther may not be formed, or anthers are formed but meiosis may be abnormal. A
Does glycolysis occur within the mitochondria? Glycolysis occurs in the cytosol and not within the mitochondria. Pyruvic acid molecules later enter mitochondria to participate
a) What are the needsfor an organism to be an indicator organism? b) In Australia, National Parks and coastal beaches attract various visitors during holiday periods. EPA is
Chromosomes, coloured bodies, are composed of proteins and DNA; so are chromatids. At metaphase I there are 46 chromosomesaligned in pairs along the human cells equatorial plate. A
Define the Peripheral Nervous System (PNS) Peripheral nervous system consists of cranial and spinal nerves. There are twelve pairs of cranial nerves. They arise from brain.
Organisms of the so-called HACEK group, (Haemophilus, Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Eikenella species, Kingella kingae) which are part of the upper
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