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Q1. Activation of T cells requires that antigens be presented from antigen-presenting cells, not simply by exposure to the antigen in solution. What biological rationale may underlie this requirement - consider both from the perspective of how this can aid in generation of a cytotoxic T cell response, and how it could aid in avoiding undesirable T cell responses.
Q2. What are Nuc, Flag, ER, Mito, Chlora, Golgi, Ves and Lys short for? What does each of these organelles do in the cell?
Noah is a technician assigned to photograph chromosomes. At what stage of the cell cycle are the chromosomes sufficiently condensed that they FIRST become visible under light microscope.
Illustrate the texture and arrangement of the lungs of the cat. If you were asked to create a karyotype from the chromosome spreads you made from HeLa cells, list materials you could use and describe how you would create the karyotype.
The brown and scarlet mutations assort independently. If fruit flies that are heterozygous for both of these mutations are intercrossed, what sorts of progeny will they create, and in what proportions? Describe how you got the answer.
Evaluate and contrast the philosophies of John Locke and Charles Darwin as they relate to developmental theory. In designing the drug that would bind to the active site and jam it, researchers must use which type of molecule.
Evaluate the sizes of the different digestive organs of an earthworm. Which organ is the largest? How does its size make it well suited for its function.
If two organisms each with the genotypes TtGg mate what is the probability that they will produce a child with the dominant phenotype for height and recessive phenotype for colour.
The -10 and -35 sequences in bacterial promoters are separated by about two turns of the DNA double helix (remember genetics?). How do you think transcription would be affected if the deletion were introduced such that the -35 sequence was moved to -..
Most of us can't even imagine a world without oxygen. Though, as you learned earlier, chemically oxygen is a powerful oxidizing compound. What effect(s) would the increase in oxygen levels of atmosphere have on the organisms that existed at that time..
choose two organisms from two different trophic levels in the marine ecosystem and explain the impact of the algal bloom on their ecology.
What is the possibility that their first child will have attached earlobes. which among the conditions or substances do ALL archaeans need for survival and reproduction.
Trace a drop of blood from tissue cells of the left knee to capillaries of the right arm. Be sure to stop at the lungs along the way! Keep track of the left and right sides of the heart, and mention all the valves through which the blood travels.
The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic of all of these extracellular structures.
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