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Question: A quorum sensing response in a hypothetical organism (let's call it Vibrio imaginarium) results in upregulation of one gene (qsg1) and downregulation of another (qsg2). Assume that preliminary experiments have been performed and these experiments have shown that homoserine lactone functions as the autoinducer. You are interested in how the quorum sensing response is regulated in this organism and you have isolated a mutant strain that is no longer able to upregulate qsg1 and downregulate qsg2 when treated with homoserine lactone. You find that this mutant strain fails to produce a single protein that is present in the wildtype strain due to a frameshift mutation within a particular gene (qsg3). Based on the various mechanisms of gene regulation discussed in class, propose a mechanism for how qsg1 and qsg2 expression is regulated. Describe at the molecular level all elements and allosteric interactions that your proposed mechanism requires. Your answer should be detailed but concise.
Tina is consuming 12 mg of iron per day. Her RDA is 15 mg. She has no condition warranting a greater-than-normal need for iron. Which of the statements is true about her consumption of this nutrient.
Perineal pain due to swelling is common after delivery. Discuss how can it be treated? If extreme pain is Developing and getting worse over time and is unrelieved by pain medications.
A test tube contains starch, pancreatic amylase, and water. The buriet is negative. After 30 minutes, Benedict's test is positive. What substance is present.
As we have discussed in class, individual phylogenetic methods are best suited to particular kinds of troubles. For each of the following data sets, assess the suitability of maximum parsimony to that data set.
If NAD+ is an electron acceptor that becomes NADH and the NADH then donates a proton to ATPase, should not NADH now become NAD- since it lost it's proton but still has electron?
The grain triticale is a hybrid plant with 2-haploid sets of chromosomes. Suppose if triticale is chemically induced to become tetraploid and Create a hypothesis contain the highest biodiversity
What is the possibility that the son would have both the Xg antigen and ichthyosis. Why is the man a major candidate for a heart attack.
The 1st gene is responsible for determining blood group A,B or O. For this gene both A and B are dominant and O is recessive.
An A=T mispairing leads to an A=C substitution. The other DNA helix will contain a(n) __ pair.
A person is heterozygous for a mutation in a STAT gene replaces a tyrosine in coding sequence with a phenylalanine. The missing tyrosine is normally phosphorylated by a JAK bound to a cytokine receptor.
Application of an insecticide to control mosquito populations in malaria infested areas quickly resulted in a dominant mutation, R, resulting in insecticide resistance.
How many DNA fragments would be produced.
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