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You have an F- strain of E. coli that is resistant to strepto- mycin (Str(r)) but requires the following amino acids for growth on minimal medium: arginine, cysteine, methionine, phenylala- nine, and proline. You do a series of interrupted mating exper- iments with two different Hfr strains, Hfr1 and Hfr2, both of which are wildtype for all amino acid markers, but are Lac(-) and Str(s) (sensitive to streptomycin).The following data are the times in minutes at which you first observed recombinant progeny containing the indicated amino- acid marker (prototrophy).Results of F- x Hfr1 cross Arg+ = 5Cys+ = 65Met+ = 75Phe+ = 35Pro+ = 10Results of F- x Hfr2 cross Arg+ = 40Cys+ = 70Met+ = 60Phe+ = 10Pro+ = 35Give the order of genes on the Hfr1 chromosome in the order transferred (e.g. CysPheMetArgPro)Give the order of genes on the Hfr2 chromosome in the order transferred (e.g. CysPheMetArgPro)You do a new mating experiment with the same strains. You interrupt the mating after 60 minutes and plate on a medium that selects for progeny that are re- combinant for the phenylalanine gene (Phe+). What sup- plements/antibiotics must be added to the minimal medium
Explain how cell division and the sexual reproduction help in genetic variability of organism. How do both the meiosis and sexual reproduction (fertilization) generate offspring which differ genetically from parents?
Think about a grass that grows back to mid phase in fifteen days and low phase III in 30 days after grazing down to the minimum height for efficient re-growth and plant survival.
What error did the new receptionist make that resuled in the insurance company refusing to pay for the hip x-rays describeyour answer
Determine how many molecules of methylene blue dye are in a 256-fold dilution of a 0.00025 percent methylene blue dye stock solution?
A body was discovered and diagnosed as having died due to oxygen deprivation. Explain why the toxicology tests included a test for cyanide poisoning.
What series could you use to make a beta barrel with twelve antiparallel strands? Write out one repeat of the sequence as follows: M-(your sequence) 12.
Suppose that the you are given two cultures, one of a speacies of gram-positive bacterium and one of a species of Mycobacterium.
Suppose that the cell membrane is permeable to water but not to ions, Explain what will happen to the cell in terms of osmosis. If the membrane were permeable to ions,
Explain bioremediation in detail. Write an essay on the bioremediation.
Examine the anatomical structure of ten different organelles in the cell and their respective functions and Analyze five different types of connective tissue with examples of functions and location within the body.
Provide the number of divisions, number of daughter cells, what each process creates, and the steps for both mitosis AND meiosis.
You are the owner of a company that sells cleaning products. The people in Research have two new products for you to review. The first is a kind of hand soap that they say will cut greasebecause "it is made from a lipidand like dissolves like."comp..
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