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In the presence of high intracellular concentrations of tryptophan, only short transcripts of the trp operon are synthesized because of attenuation of transcription 5' to the structural genes. This is mediated by the recognition of two Trp codons in the leader sequence. Explain what effect mutating these two codons to UAG stop codons would have on the regulation of the operon in the presence or absence of tryptophan.
A small, impermeable membrane is placed between the anchor cell and the other vulva precursor cells in a larva of C. elegans. What would you expect the result to be.
If you transform bacteria with the plasmid library made in part b above, divide the transformatnts into 20 aliquots and find one has the insert of interest, now how many clones do you need to screen.
If an albino (autosomal recessive trait) woman is married to a man with normal colouring and they have an albino child, what is a genotype of the man.
In mice, the A y allele of agouti mice is ecessive lethal allele, but it is dominant for yellow coat color. What phenotypes and ratios of offspring would you expect from the cross of a mouse
What is the function of lysosome.
Find and share case studies on organizations that did or did not effectively implement OSHA's guidelines for safety. Determine the medical and legal consequences of non-compliance?
You are studying compound X and are trying to determine whether it is a competitive or a non-competitive inhibitor of an enzyme reaction catalyzed by the enzyme zyrase.
The msh6 protein is involved in mismatch repair. How does mismatch repair differ from proofreading.
A mole of an assured compound contains 207.7 g of lead and 32.00g of oxygen. Without doing any calculations, tell whether a formula Unit of a compound contains more atoms of lead or more atoms of oxygen. Explain in details.
You have created a cDNA library of human DNA from fibroblasts (a type of skin cell), and have obtained from a colleague a cloned histone H4 gene from yeast.
Describe about how various kinds of systematic variations in the Earth's orbit.Describe the results and give the genotype of the P.
Suppose that the each replication fork moves at a rate of 500 base pairs per second, how long would it take to replicate the E. coli chromosome from a single origin of replication?
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