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1. (From Modeling the Dynamics of Life by F. Adler) Think about an interaction between two mutually-inhibiting proteins with concentrations x and y, given by the differential equationsdx = f(y)?x dtdy =g(x)?y. dtBoth f(y) and g(x) are positive decreasing functions.a) Explain each of the terms in these equations. What is the influence of the proteins on each other?Do part b) for the following two cases:Case 1: f(y)= 1 , g(x)= 1 ; 1+?y 1+?xCase 2 : f(y) = e??y, g(x) = e??x.
Propose a hypothesis to explain the current decline in Songbird numbers. Design an experiment that could test your hypothesis.
The 2.1kb long insert was excised from the source DNA using NotI. The insert fragment has 2 SphI restriction sites. One of these located 1.3kb from 1 end of fragment and other is located 0.2kb from other end.
Analyze the DNA of the Phenylalanine hydroxylase gene in patient with phenylketonuria revealed a mutation in protein coding region whose predicted effect would be to replace the amino acid aspartic acid, with histidine.
The phosphate system serves to buffer intracellular fluid of cells at physiological pH because pK2 (7.20) lies near the normal pH range of 6.9-7.4. If the total cellular concentration of phosphate is 19mM and the pH is 6.9, what is the concentrati..
How several 25 ml vials can they fill. An Eon of time is defined as 1 billion years (1x10^9 years). How long is this in seconds? Assume one year is equal to 365.25 days.
Describe these results by explaining how and why the introns are eliminated and proved the genotypes of Mini, Mickey and Timmy, and their children.
Explain what happens to the uterus after birth. At the first fundal checks, where will the fundus usually be found? List the finding if the bladder is distended and Define the terms puerperium, involution and subinvolution.
In some cases the first gene in the linear sequence appears to be transcribed at a much higher rate than the second and subsequent genes (as in many but not all mRNAs contain the sequences encoded by gene 2 and beyond).
Determine which of the following repair pathways do not involve the use of a homology dependent repair system?
Suppose that every non sterilized individual makes exactly ten gametes. Determine the total number of gametes?
Discuss when we compare amino acid differences to determine the evolutionary "distance" between organisms, what assumptions are being made about the rate at which mutations occur over time?
Our heart pumping and our circulatory system keep us alive. Many things like poor diet, lack of exercise, drinking and drugs damage our systems, even to the point of early death.
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