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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 the generation of a cytotoxic T cell response, and how it might aid in avoiding undesirable T cell responses.
Q2. What is the biochemical pathway that corresponds to duplicate dominant epistasis in genetics? There is a 15:1 ratio of phenotypes, there are two genes involved: A and B. but what is biochemical pathway that causes this ratio to form?
why the sequences are read in different reading frames.
Calculate the size of the smallest resolvable object if 600-nm lightis used to observe a specimen with a 100oil-immersion lens having a numerical aperture of 1.32. How could resolution be improved using this same lens?
Illustrate the metaphase cell of this culture showing predicted distribution of radioactivity on the autoradiograph.
Please provide a reasonably detailed explanation and weblinks/book names of your resources at the bottom of your answer. However, please be concise to the question -- no dissertation-sized answer please! Thank you!
Nutrients from the food we eat must be absorbed into bloodstream so that they can be delivered to various parts of the body.
A white lady, aged sixty, and she has lived in the USA all her life. She has three children, is 160 cm high and weighs ninety kg.
A 2 kbp (1 kilo base pairs =1,000 bp) DNA fragment is to be amplified by PCR from the genome of nematode C.elegans, what fraction of the total DNA does the target sequence constitute
Which of the four muscular chambers of the human heart directly propels blood into the pulmonary circulation?
A cylinder with a movable piston is filled at 24oC with a gas that occupies 36.2cm3. If the maximum capacity of the cylinder is 65.2cm3, what is the highest temperature to which the cylinder can be heated at constant pressure without having the pi..
Full range of motion for each muscle or group of muscles, while applying resistance to the muscle is testing.
Assume if you want to rid an experimental organism of the function of a gene, you can use RNAi. What would you inject into the organism?
Nucleus Structure: a double membrane bound eukaryotic organelle containing the chromatin (supercoiled DNA) Effect if lost: the cell would not be able to replicate.
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