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Pseudomonas has a plasmid containing the mer operon which includes the gene for mercuric reductase. This enzyme catalyzes the reduction of the mercuric ion hg2+ to the uncharged form of the mercury,hg0. Hg2+ is quite toxic to cells;Hg0 is not.
A) What do you suppose is the inducer for this operon?B) The proteins encoded by one of the mer genes binds Hg2+ in the periplasm and brings it into the cell. Why would a cell bring in a toxin?C) What is the value of the mer operon to pseudomonas?
Assume you are given an isolated muscle with its motor nerve intact. The preparation permits you to make electrophysiological measurements from the nerve
If sigma(70) and RpoS recognize different promoter sequences, and some genes have both a sigma(70) promoter and an RpoS promoter, then explain how either sigma factor could activate transcription of those genes.
Briefly describe how three different processes that occur during a sexual life cycle increase the genetic diversity of offspring.
How do tidal forces contribute to ocean currents and global temperatures?
Design an enrichment medium to isolate a detergent-degrading bacterium that is found in soil.
How would you answer to a person who argued that there is nothing to worry about because natural systems, through natural succession, will heal the wounds of human activities and restore the balance of nature.
If we have a dsDNA molecule and we require an ssRNA molecule, which of the two DNA strands will have the same sequence as the RNA molecule?
Two genes (geneA and geneB) act redundantly to change a colorless product into a red pigment in a particular species. If a pure-breeding red line.
Sidney Brenner discussed that the code was non overlapping because he considered that coding restrictions would occur if it were overlapping.
Why is the rocky intertidal such a great place to advance ecological understanding of interspecific interactions ? I just need several main reasons, do not give me a such long paragraph.
Genes for color blindness and hemophilia are linked on theX-chromosome in humans with a recombination frequency of 30 %. Awoman whose father was a color blind hemophiliac and mother wasnormal with no history of color blindness and hemophilia wants..
There is a hybridization event between two different species with the same chromosome number. The hybrids are sterile. Explain your answer.
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