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IF 15% of the nucleotides in a DNA molecule contain guanine, what perecntage of the nucleotides contain each of the other three bases? Explain your reasoning.
To demonstrate that you understand the molecules of life you will be creating and explaining the following as models.
High concentrations of caffeine causes an isolated muscle to contract in the absence of any activity in the motor nerve. This contraction is not blocked by nicotinic blocking agents like curare. Where do you think caffeine acts?
Determine pseudodominance and how is it produced through a chromosome deletion and how does bacterial DNA differ from eukaryotic DNA?
A woman who undergoes an inulin clearance test has an inulin concentration in her urine of twenty mg/ml; an inulin concentration in her blood of 0.70 mg/ml.
The KM of a Michaelis-Menten enzyme for a substrate is 1.0 x 10-4 M. At a substrate concentration of 0.2 M, νo = 43 μM x min-1 for a certain enzyme concentration. However, with a substrate concentration of 0.02 M, νo has the same va..
Pseudomonas aeruginosa is a pathogen that affacts burn patients and people with cystic fibrosis. This organism manufactures a toxin called exotoxin A that inactivates elongation factors in eukaryotic cells.
Think about the following hypothetical scheme of determination of coat color in a mammal. Gene A controls the conversion of a white pigment P 0 into a gray pigment P 1 ;
Suppose that a random co-polymer consisting of 50% A and 50% C is used as a template for protein synthesis in a cell-free system.
We are studying ligand-dependent regulation of the estrogen receptor. Explain why the ligand has a conformational change and why this is important to endoplasmic reticulum function.
Explain why people have different skin colors, despite having the same number of melanocytes in their skin.
Hypothesis: since the normal substrate for the enzymes is lactose, adding lactose along with ONPG will reduce the rate of yellow color formation.
Explain the role of the citric acid cycle as a central metabolic mechanism. Explain what happens to the cells' abilities to oxidize acetyl CoA when intermediates of the cycle are drained off for amino acid biosynthesis.
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