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Question 1
Write a short account of THREE of the following topics:-
Your short account should include descriptive and explanatory text with annotated diagrams as appropriate. You should expect to write about a side of A4 for each answer. Each topic carries equal marks.
The experiments of Meselsohn and Stahl with E. coli on DNA replication.Restriction endonucleases and the analysis of the results of a restriction enzyme digest.
Activity at the prokaryotic replication fork.The structure of DNA.The experiments of Beadle and Tatum with Neurospora crassa on the link between gene and product.Translation.
The experiments of Hammerling and Brachet with Acetabularia species on the location of the genetic material in eukaryotes.
Question 2In prokaryotes, transcription begins at specific points in the genome known as promoters.a) Using a series of annotated diagrams show what happens at the start of this process. (40 %)b) Using annotated diagrams show the elongation phase of transcription. (20 %)c) In prokaryotes there areset termination signals for transcription. Using annotated diagrams show the two different mechanisms used.
A group of citizens concerned with the environment cost of modern agriculture decides to take a proactive step. Instead of legislation and bureaucracy aimed at farmers, they decide to focus on the consumer end of the problem with an educational curri..
Present two factors contributing to the solid waste problem in the U.S. How could these factors be changed or controlled for the better? What problems are there with current recycling efforts? What is being done in your area relative to recycling?
A signalling pathway in the cell is turned on by phosphorylation, leading to reduces in cell division. Determine the effect of a mutation that results in the overexpression of an oncogene coding
Which of the following cells store the highest glucose concentration? The level of exercise that increases body's core temperatureto 39 C. The peptide bond associated with lysine can be broken by
Humans have quite a few instances of suboptimal design and evolutionary quirks. Like most animals, we vestigial structures things that evolved for specific reason at one point in our evolution,
How would you approach the physician? What are the reasons for the unavailability of certain pharmaceutical items because of third-party payer reimbursement schemes?
A hypothetical grassland system contains two species of grass, two species of rodent that eat grass, and one species of snake that feeds on the rodents.
In garden peas, grey seed coat color is dominant to white seed coat color. In the following cross, the phenotypes of the parents and offspring are known, but the genotypes are unknown.
Write about how people propose to capture carbon dioxide and about three methods for storage. Check at least two sources before writing.
which statement about spontaneous generation is FALSE.
How does inefficient transfer of energy among trophic levels result in the typically high endangerment status of many top predators.
The breakdown of complex glycogen molecules into simple glucose molecules is most accurately described as a anabolic reaction.
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