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Q1. The calculation of exogenous leptin, at concentrations found in obese patients, induces significant morphological changes in DC. The number, length, and diameter of dendrites/llamelopodia are dramatically increases upon treatment of leptin (control experiments verify that the changes are specifically leptin-induced).
Diagram two experimental approaches that would determine which signalling pathway is specifically responsible for this morphological change.
Q2. Evaluate the sizes of the different digestive organs of the earthworm. Which organ is largest in the earthworm? How does its size make it well suited for its function?
Describe the three kind of the recombination among microorganisms. DNA is transferred horizontally among same generation. The phenotype of gene at end of recombination will be changed.
Two homozygous, white-seeded corn lines were crossed and all progeny were red-seeded. These red-seeded F1 progeny were selved, and the population segregated 9 red-seeded:7 white-seeded. Explain these results by determining the number of genes cont..
A patient has esophageal cancer and should have a feeding tube inserted. The nurse tells the patient that the tube will be inserted surgically into the duodenum. The wife asks why the tube will not be inserted into the stomach directly.
Bonnie tells you that she has had many viral infections and is concerned about getting cancer. Which of the following is a potential cause of cancer?
As you have learned in the readings, extinction is a natural selection process. You have also read that humans are often responsible for accelerating this procedure.
A researcher lyses a cell that contains nucleic acid molecules and capsomeres of tobacco mosaic virus (TMV). The cell contents are left in the covered test tube overnight. The next day this mixture is sprayed on tobacco plants. Which would be expecte..
Describe two different population genetic mechanisms that may cause populations to experience imperfect adaptation. Give an example of one of the mechanisms and describe how it leads to imperfect adaptation.
RNAse is an enzyme that cleaves the P--O^5' bond in RNA. it has two His residues in the active site. Suggest a plausible explanation why the enzyme activity changes when pH is increased or decreased from ~pH 6.0.
What neurotransmitter is released by motor neurons to cause skeletal muscle contraction? How does this neurotransmitter cause contraction?
Describe the function/role of Five different post-translation modifications that occur to proteins.
The net transfer of water between the interstitial fluid and ICF across the plasma membrane, Insects prevent water loss and disturbance in the osmotic balance in cells by.
How does divergence effect Fst values between 2 populations? AND List 3 reasons that the Ne will be smaller than N. In each case, explain HOW this scenario results in a smaller Ne. Detailed answers get the points.
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