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The trp (tryptophan) operon which is shown in the figure will have five structural genes encoding enzymes for tryptophan biosynthesis with an upstream Ptrp (trp promoter) and Otrp (trp operator series). The trp operator region in part overlaps the trp promoter. The operon is regulated like that transcription happens when tryptophan in the cell is in short supply.
Q. Explain microbiology of Soil? Ans. You would realize that the soil contains greatest varieties of microorganisms. It actually serves as a medium for growth and developm
Q. What is action mechanism of antibiotic penicillin? Penicillin, discovered by the Scottish doctor Alexander Fleming in 1928, is a drug that inhibits enzymes essential for the
A decrease in parasympathetic discharge to the heart leads to A. a decrease in the conductance of F-channels in SA node cells. B. an increase in the conductance of potassium
Which one of the following is one of the characteristics of a biological community? 1. Stratification 2. Natality 3. Mortality 4. Sex-ratio Stratification
Mechanism of Phloem Transport The efficiency and magnitude of translocation of food material are evident from the annual yields of various crops and fruits. Now, the question
What are sieve tubes suited for translocation of food? a.bordered pits b.no end walls c.bordered lumen and perforated cross walls D.no protoplasm
Define Maternal Dietary Intake and Foetal Outcome? Among the various nutrients, energy intake appears to be the most crucial, for developing countries. Studies from India have
Diagnostic Wax Up A diagnostic wax up should be done by you or got done from a laboratory for each and every case regardless of the extent or difficulty level of the case as it
What is dry mass? When biomasses are compared often the method of dry mass is used. The dry mass is the total mass less the water mass of an individual. The total mass is also
amphibia class characteristics
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