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What is an example of a symbiosis that affects the entireecosystem, and not just the 2 species involved?
Assume you are studying genes and DNAsequences involved in the regulation of the grandoperon. When your lab's strain of e. coli are in the presence of the sugar "grandiose," transcription of 2-enzymes grandAand grandB increases.
The Vm outside the cell is 0, the Vm inside the cell is 40 mV. If the outside concentration of Mg+2 is 30 mM, and the internal concentration of Mg+2 is 3mM, what direction will Mg+2 ions move if a Mg+2 ion channel is opened?
write out the catabolic pathway that breaks down asparagine (an amino acid). Draw the complete atomic structures of asparagine and its metabolites that lead to oxaloacetate?
A mouse species has three phenotypes, black, brown and white. There are two genes responsible, and there is epistasis between the two genes. If two white mice mate, what is the probability that their first offspring will be white?
Describe two chromosome elongation techniques used in cytogenetic laboratory and their mechanisms. Please explain.
When looking for a gene of interest, we often scan cDNA libraries. What is the difference between a cDNA and a genomic library? Can you think of situations in which we would probe a genomic library?
Codons with U or C as the second nucleotide, for example, tend to specify hydrophobic amino acids. Can you recommend a possible explanation for this phenomenon in terms of the early evolution of the protein synthesis machinery?
describe the decolorizing step in the Grain stain, what isused, why is it important and what is accomplished?
Why is it a significant advantage for a virus to have a persistentlifestyle? Why does HIV package reverse transcriptase in capsid? How is an attenuated virus is made? How does the virus make sure that an RNA genome gets in everyvirion?
What is the skene's gland? Understand the relationship this gland may have with the vagina, urethra, and female ejaculation.
What is meant by a "stable phenotype" for cells? How can one go about trying to ensure a stable phenotype in vitro?
What results would you expect if your unknown contained riboflavin, pryidoxine, or both?
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