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Look up the pKas of glutamic acid and draw thestructures for the predominant forms of glutamic acid at pH 1.0, pH3.0, pH 7.4, and pH 12. Examine the structures and determine thenet charge of glutamic acid at each of these pHs. The pH at which the predominant form of an amino acid has a net of 0 is known asthe pI. Estimate the pI of glutamic acid.
Cleavage of DNA with restriction enzymes provides landmarks and sequence information. How frequently are specific sites found? How many sites are expected? Does this change if the DNA is circular.
What events in the viral life cycle take place in the nucleus?
The disease rabies is caused by a virus that attacks the central nervous system. The virus is normally introduced by an animal bite that breaks the surface of the skin. Since the virus is not motile, why is it located in the central nervous system..
Given that axons grow out through the action of microtubules, what should happen to axons growing out from a neuron when they are exposed to colchicine?
The basis of inferential (testing) statistical analysis is that observations or data are composed of two elements, while expectations are based solely on the hypothesis.
How would DNA replication be affected if ligase were not available?
What do you believe must be done to feed 9 billion people? Discuss possible solutions to population growth or ways to increase food production as we advance foward. Also, discuss ways biology can help address some of the technological problems we ..
Motor proteins use the energy in ATP to transport organelles, rearrange elemts of cytoskeleton during cell migration, and move chromosomes during cell division. Which of the following mechanisms is sufficient to ensure the unidirectional movement ..
List the two kinds of macromolecules that have been partially digested by the time acid chim moves into the intestine. Where did this digestion take place, and what enzymes are involved.
If you examined a microscope slide of a cell and noticed that the chromatid pairs were aligned in the center of the cell, how would you classify this stage of the cell cycle?
If a transferrin receptor has a cross-sectional area of 50 Angstroms X 100 angstroms (5x10nm), and how many receptors could be accomodated in a 100nm clathrin-coated vesicle assume that only 50% of surface area can be occupied by proteins.
A 28-year old woman severly twists her right ankle in a sleeding accident. Four hours later, the ankle is swollen and appers blue-white. Which of the following mchanisms of disease best explains the function of bradykinin geenerated at the site of..
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