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A three-factor cross in Salmonella typhimurium was performed using bacteriophage P22. The cross was 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- 583Arg+ leu- his+ 300Arg+ leu+ his+ 114Arg+ leu+ his- 1What is the order of the three markers?What are the contransduction frequencies?
Discuss the defining characteristics and methods of reproduction of organisms belonging to the Kingdom Fungi in general,
Which of the following statements reflects gene density.
In interrupted mating experiments using an Hfr strain in E. coli, you find that two genes, bio and arg, are transferred at about the same time. A third gene, pab is transferred slightly later.
Considering an E. coli promoter that could be recognized by a ?70-containing RNA polymerase holoenzyme, which of the promoter elements are always present, and which can be missing or altered? How does this E. coli promoter compare to a typical euk..
Discover a protein that is released from the cell and explain its role in the body. What is the function of the protein? How is it related to exocytosis?
What would happen to urine output of a rabbit if cells of tunica media of all glomerular afferent arterioles were totally inactivated?
If you analyze the diameter of the field of view for the 4X objective lens of a compound microscope with 10X oculars as 4.5 mm, what is the diameter of the field of view for the 100X objective lens?
What drugs are commonly used to anesthetize a patient undergoing abdominal surgery and why? Critically discuss the most common anticonvulsants or tranquilizers used to treat epileptic patients (drugs to prevent seizures)?
You are trying to find a restaurant to take your great grandmother for Mother's Day. You have taken her to several places in town, but she is rarely satisfied with the food she is served, complaining that the food lacks flavor.
If the centrioles are mispositioned in the cell, the functional mitotic spindle would fail to form. In this state, how will chromosome segregation be affected . Microtubules will not attach to kinetochores.
Explain two reasons why kidney failure can affect calcium homeostasis. List 2 things that can help to increase bone formation in the elderly.
The "Primordial soup" includes the mixture of elements and gases which are thought to have started life on the Earth. Specify where did the gases and elements come from?
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