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a) How would you prepare a 250 ml solution, 0.5 M in sodium phosphate buffer at pH of 7.0. You have in the laboratory monobasic sodium phosphate (NaH2PO4) and diabasic sodium phosphate (Na2HPO4). pKa = 7.2
b) Describe how you would prepare the above buffer solution if you only had NaH2PO4, and a solution of NaOH. What other equipment would you need?
The picture below shows xylem and phloem tissue in a stem. Arrows show the direction of movement of water (gray arrows) and sugar (black arrows). Using your knowledge of water potential,
What are some reasons for reestablishing wolves in Yellowstone National Park? What effects might the reintroduction of wolves have on the ecological communities in the region? What might be completed to mitigate the conflicts between ranchers and wol..
In a cross in Drosophila, a female heterozygous for the autosomally linked genes a, b, c, d, and e was testcrossed with a male homozygous for all recessive alleles.
With these anatomical features in mind, do some research in order to determine an angiosperm which has modified leaves, stems, roots or flowers that do not function in the normal manner, or that function in an unusual manner.
G-protein coupled receptors are important drug targets. Research online on one GPCR that is an important drug target and describe briefly in your own words which disorder it is involved in and what drug is targeting this GPCR. In your description,..
Assume you performed a gram stain on a sample from a pure culture of bacteria and observed a field of red and purple cocci. Adjacent cell were not always the similar colour. What do you conclude.
Describe the process of DNA replication and the importance of DNA complemetary base pairing to that process. Why is this process called "semi-conservative"?
A 23 year old begins to lift weights daily, and his muscle enlarge. Inhibition of which of the following intracellular process prevents skeletal muscle hyperplasia in this individual?
Some of the Drosophila you are working with have miniature wings. Suppose you perform the following three crosses to determine the heritance of the miniature wing phenotype.
Suppose that the lengths of the double-helical regions and the lengths of the single-stranded regions in them vary within relatively tight limits.
Explain why carcinomas are more common than sarcomas? Describe briefly your favourite new term or concept from this class.
As a biologist it is your job to look for plants that have evolved structures with a selective advantage in dry hot conditions. Which of the adaptions would be least likely to meet the objective.
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