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Question: Explain the Hershey-Chase experiment. Describe in your own words, as if you were talking to someone with no genetics background, how they used radioactive isotopes to demonstrate that DNA, not protein, is the genetic material. Be sure to include details of the experiment in your explanation.Question: Discuss in detail the two different types of operons found in bacterial genomes (inducible operons and repressible operons) and describe how they work. Then describe the three different forms of prokaryotic genetic recombination discussed in the commentary Prokaryotic Genetic Recombination. Hypothesize how recombination might adversely affect the functioning of an operon such as the lac operon or the trp operon. What might be the metabolic implications for an E. coli cell that experiences a disruption of one of these operons?
Estimate the isoelectric point for the peptide: glu-asp-arg-asn-ser-asp-glu-his-lys-asp Discuss any assumptions made; exact numerical accuracy is not important - approximations may be used.
find the sequence of amino acids coded for by this mRNA.
why the sequences are read in different reading frames.
The maltose transporter maltoporin spans the outer membrane of E. coli. It is comprised of 18 successive antiparallel Beta - strands arranged like the staves of a barrel to create a channel through the membrane.
Offer a model to explain how the F-box protein SLF and the S-RNase mediate self incompatibility. Be sure to account for the action of these proteins in compatible and incompatible interactions.
Explain the structure and function of cellular organelles.There exist several examples of the eukaryotic cells. Algae, Fungi, Plants, and animals are all composed of the eukaryotic cells. Some algae and fungi are unicellular organisms.
Elucidate results of all four crosses, using clearly defined gene symbols. describe origin of both of the original prototrophic colonies.
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.
Such examination would be costly and it would be tricky to ensure that all unforseen consequence was examined. Given issues discuss whether you believe society should continue to invest in the use of transgenic organism, justify your position.
Explain the epidemiological attributes of this episode. In which special circumstances can cross-sectional surveys be utilized to test the hypotheses? In your answer explain briefly the characteristics of the cross-sectional study.
A population of collared lizards is fragmented into 3-glade populations through an aggressive anti-forest-fire campaign. At the "B" locus, there are only two alleles
explain which is a key component of the cytoskeleton.
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