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A three-factor cross in Salmonella typhimurium was performed using bacteriopage P22. The cross between an arg-leu-his- recipient bacterium and bacteriophage P22, which was grown on an arg+leu+his+ strain. 1000 arg+ transductants were selected and tested on several selective media by replica printing. The following results were obtained:
Arg+leu-his- 583
Arg+ leu- his+ 300
Arg+ leu+ his+ 114
Arg+ leu+ his- 1
What is the order of the three markers?
What are the contransduction frequencies?
Which of the follow was necessary to this confirming experiment. Phosphorus is not present in amino acids in the protein coat of phage.
Explain why do diuretics produce less diuresis than the loop diuretics and why would thiazide diuretic be chosen over the others for the treatment of hypertension?
The fish are cold-blooded while the cows are warm-blooded. Explain, in terms of assimilation efficiency and production efficiency, why more people can be fed from the fish than the cows (assuming similar amounts of algae/grass).
Determine where the chain would be more likely to show beta bends or reverse turns.explain where one would fin cross-linked disulfide bonds.
If D is a dominant allele for the Rh factor, what will be the genotypic ratio for a monohybrid heterozygous cross of (Dd x Dd)? What will the phenotypic ratio be?
There must be some major drawbacks t the widespread use of non-embryonic stem cells. What are those draw backs?
Suppose you are a geneticist and you're asked to examine the effects of a radiation leak that occurred at a facility in Iraq several years ago. How will you assess the level of mutations caused by this leak.
Illustrate the main types of faults and corresponding directions of stress. Differentiate between fault and joint. How does the stress differ between the two? Of what importance are these fractures to other geological processes.
An attenuated active ("live") viral preparation that has low virulence but can still invade and replicate in host cells.
Urine excreted by mammals contains many valuable molecules such as glucose and amino acids, but they are at much lower concentration in excreted urine than in blood.
Suppose that you perform fruit fly crosses with different pairs of 3-X-linked traits specified by genes x, y, and z. You observe the following frequencies of recombinant
When the antifungal agent myxothiazol is added to a suspension of chloroplasts, the PQH2/PQ ratio increases. Where does myxothiazol inhibit electron transfer?
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