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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.
In one study of a heavily polluted area near Birmingham, England, a researcher observed a frequency of 87% melanic Biston betlularia. Calculate the frequency of the dominant allele
How different are gymnosperms from bryophytes and pteridophytes? Gymnosperms are not cryptogamic as bryophytes and pteridophytes are. They are phanerogamic and so they form flo
name the sturcture formed when the male and female nuclei fuse during fertilisation.
Convert 3.5°F to Celsius Four hundred pounds is how many kilograms?
Define Miscellaneous Functions of Protein? Besides the functions enumerated above certain other important miscellaneous functions of proteins are included herewith. These inclu
1. Fats promote absorption of fat soluble vitamins like vitamin A, D, E and K. Patients of cystic fibrosis often absorb fat poorly and are at-risk for fat-soluble vitamin deficienc
We have no antibodies against any blood group when we are born still we say that some blood groups are incompatible for us.why?
What are the basic constituents of the cell membrane? The cell membrane is produced of lipids, proteins and carbohydrates. The membrane lipids are phospholipids, a special t
Ecosystems main functions are physical, chemical and biological processes. Which is required for if maintenance of ecosystem. Some important function- 1. Production of bi
Q. Do protozoans have a cellular nucleus? All protozoans, as eukaryotes have nucleus, some species like the paramecium have two nuclei the micronucleus and the macronucleus.
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