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Question 1: Explain why only certain cell types are permissive for transcription of HIV proviral DNA. What cellular factors are involved and why?
Question 2: What are the selective advantages and disadvantages for DNA viruses in relying on host cell apparatus for production of mRNAs and replication of their genomes? Give examples of host cell apparatus required.
Question 3: DNA viruses generally possess a precisely ordered and temporal sequence of transcription of viral genes. Why is this control necessary and beneficial to the virus? By what molecular mechanisms do viral proteins help mediate this control? Give specific examples.
Question 4: DNA viruses are heavily reliant on the host for providing factors required for replication. Replication of eukaryotic DNA is a very precisely regulated process and normally only occurs prior to mitosis. Therefore, viruses have evolved a number of mechanisms for enabling viral DNA synthesis when the host cell is in the Go state. Describe elements of one such mechanism and why they are required for viral replication. What are the advantages for the virus?
Question 5: Many DNA viruses possess latent infectious cycles. What are the characteristics of a latent infection and how does a latent virus alter both its production of RNA and replication to maintain the latent infection?
Question 6: What are the complications/obstacles for a single stranded DNA virus to replicate its genome. Describe mechanisms a specific virus uses to overcome these obstacles.
What does this show about the relation between voluntary and involuntary reflex movement. If the bacteriorhodopsin molecules were randomly oriented, would you expect ATP to be synthesized? Give details about the answers.
Medical history elicits the facts that she lost her husband six months previously, has been extremely depressed, and is taking sleeping pills and not eating properly. What would doctor hypothesize about the probability of senile dementia in this case..
Using principles of community ecology, propose a hypothesis to explain the results and outline her methods and science processes (as in dependent variable, independent variable, controls, constants) as used in the experiment. What extra evidence woul..
Artificial electron acceptors can be used to detect a exact organelle by cytochemistry. Name this organelle and outline the procedure that you would use to detect this organelle by cytochemistry.
Without oxygen, cellular respiration grinds to a standstill, although glycolysis can continue to make some ATP anaerobically for a short time. While oxygen runs out, why does electron transport stop? Why do you thing the Krebs cycle stops.
What colour horse would you use to expose the genotype of a black trotter. Why do mosses and ferns both require free water to complete their life cycles? At what stage of the life cycle is the water required.
Results of this analysis show that one of the most rapidly reassociating classes of DNA is substantially reduced in the older individual with respect to the 2 year-old. How can you describe this finding.
Compare and contrast gene expression in prokaryotes vs. eukaryotes from the standpoint of promoter sequences
How did the rmp change with the low na ecf solution. Discuss at least three practical, scientific, and ethical issues that may be raised by such a change in naming.
The F- strain is unable to synthesize these amino acids; therefore, they must be supplied in the growth medium. Utilize the results from replica-plating to reply the questions.
In ward's Ap biology lab 7 (the drosophila lab) describe the parental cross you received; use genetic symbols. Depict a punnett square to show how the possible allelic combinations for this gene in the F1 generation.
Your doctor prescribes a drug that should be taken orally. You don't like swallowing big pills, so in the place you crush the pill into a fine powder, dissolve it in saline, and inject it into a vein in your arm. Why is this really bad idea.
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