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In the presence of high intracellular concentrations of tryptophan, only short transcripts of the trp operon are synthesized because of attenuation of transcription 5' to the structural genes. This is mediated by the recognition of two Trp codons in the leader sequence. Explain what effect mutating these two codons to UAG stop codons would have on the regulation of the operon in the presence or absence of tryptophan.
Think about a population of one hundred individuals and the frequency of the A allele is 0.8 and the frequency of the a allele is 0.2. If the following fitness values for each genotype are applied to the next generation.
Discuss how does hyperventilation disturb the HCO/H2CO3 equilibrium? Does it result in acidosis or alkalosis? What would be kidney do in this condition?
Write down 1X4 matrices, P, G, and M that represent the nutritional values of each food. Then find 3P+2G+2M and tell what the entries represent.
What is the fate of pyruvate after it is formed by glycolysis? What is the overall reaction thermodynamics of glycolysis process?
Discuss a strategy and provide a diagram if necessary and methodology for overexpression, epitope tagging, isolation/purification, western blotting and confocal microscopy for an unknown alien protein that could be anarobic, and is sensitive to ox..
Why does fluoracetate cause citrate to build up in the Citric Acid Cycle.
What will be the sequence of an mRNA transcribed from a segment of the template strand with the following sequence. 5'-ACGTTAA-3'.
The matrix used in experiment has a fractionation range 20000 to 5x10^6 Daltons. Would you see this matrix purify a plasmid that had a molecular weight.
Discuss the differences between a gymnosperm's secondary growth and an angiosperm's secondary growth? how could you tell the stems apart?
Approximate the broad-sense heritability for seed number in this population. In a natural population of out breeding plants, the variation of the total number of seeds per plant is 16.
Explain the following parts of the neuron and give the function of each part, Describe what is happening when you stare at the image, than transfer your gaze to a blank sheet of paper.
If two parents are heterozygous carriers of Cystic Fibrosis, demonstrate a pedigree with four children showing the incidence of carriers and afflicted children.
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