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You sample a population of Salmonella typhimurium from a popular local hamburger joint Howdyburger. You find 9 isolates (clones) that are resistant to the antibiotics ampicillin and kanamycin, 32 isolates that are resistant to amipicillin but susceptible to kanamycin, and 51 isolates that are susceptible to both antibiotics. What is the frequency of each of the three genotypes in the Howdyburger population? What is the genic heterozygosity of the Howdyburger population?
Gene A converts compound A (red) to compound B (blue). Gene B converts compound B to compound C (green). These compounds determine the color of the individual. In a cross between a double heterozygote and an all recessive individual, what proporti..
What impact does the illness have on the endocrine system.
The sickle cell allele remains quite high populations of those with African Ancestry, and worldwide distribution of the sickle cell gene matches very closely to the worldwide distribution of Malaria.
Assume if you take a mature prokaryotic mRNA, and use reverse transcription to create DNA from it, will it resemble the original DNA sequence?
What are the steps in isolating the DNA from strawberries. What are the materials required to isolate DNA.
you have 0.05mL of an undiluted culture at a concentration of 3.6 X 10^6 CFU/mL. You then add 4.95mL sterile diluent. What is the dilution, and what is the final concentration of cells?
On a mole per mole basis cells obtain more energy when growing on fatty acids than on glucose. Examine the reactions for degradation of fatty acids and explain why this is true.
Calculate the physiological standard free energy change for the combined reactions in glycolysis converting 1,3-bisphosphoglycerate to pyruvate.
Describe the function of Cdc25 and Wee1 and why deficit of Cdc25 or excess of Wee1 can cause G2 arrest.
how can a G-protein open an ion channel either directly or through a protein kinase enzyme?
Is it possible for one kind of neurotransmitter molecule to have an excitatory effect at one cell, and an inhibitory effect at another? Explain using an example.
Assume you have a 12x solution of HEPES buffer and you require to use some for making 300 ml of solution Y. How much of the 12x HEPES buffer would you use, in ml?
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