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Induction of antimicrobial substances
Phytoalexins are antimicrobial substances produced by plants in response to pathogen. They accumulate at the site of infection. For example, when soya bean (Glycine mar) is infected by the fungus Phytophthora megasperma the chemical phytoalexin glyceollin is accumulated in the plant. Glucan extracted from fungal cell wall can also induce the synthesis of glyceollin. Such a substance which can cause a response in target cells similar to that caused by pathogen is called an elicitor. If phytoalexin can be produced in plants by artificial gene transfer, it would probably be possible to have disease resistant crops.
What is the fundamental difference between protozoans and algae? The basic difference among protozoans and algae is the fact that protozoans are heterotrophs whereas algae are p
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System of classification The Enzyme Commission divided enzymes into 6 main classes, on the basis of the total reaction catalyzed. Each enzyme was assigned a code number; consis
Q. Described Microbiology of Air? Ans. You would realize that air, by nature, does not contain a natural flora of microorganisms. All that comes into air is by accident and i
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Gametophytic Incompatibility In GSI systems callose deposition is not evident on the stigma but is very conspicuous in the pollen tube. Sometimes the callose deposition occurs
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Protein X has an absorptivity of 0.4 mL . mg -1 . cm-1 at 280nm. What is the ab sorbance at 280 nm of a 2.0 mg. mL-1 solutionof protein X ? (Assume the light path is 1 cm).
carnt understand its principle and mode of working
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