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While limiting the expression of MHC class II to so-called "professional" APCs partially ameliorates the problem of self non self recognition among CD4+ T cells, it remains difficult to understand how it is possible that even these cells' class II molecules are not deluged with processed "self" molecules (for example, albumin is present at extremely high quantities in the serum, so one might imagine that peptides from this alone would suffice to compete for any transiently present non-self proteins). What is/are the mechanisms that would afford enhanced processing or recognition of potentially dangerous molecules?
Why is the gene coding for ribosomal RNA (rRNA) used for establish phylogenetic relationships and how does this compare to previous methods for placing organisms in appropriate taxa.
How many dissimilar types of gametes can be produced. how much of drug will stay 6 hours after its administration.
Wild-type fruit flies, D. melanogaster, have dark red eyes. Recessive mutations in the X-linked white gene result in white eyes.
q1.provide an example for each function of the integumentary system.q2.from deepest to most superficial name and
the population of a mosquito colony in a certain region experience uninhibited exponential growth. the initial
Can viruses evolve? Why or why not? a. No, only their hosts can evolve. b. Yes, their genetic make-up responds to natural selection. c. No, they are not alive. d. Yes, they are able to alter their genetic code directly in response to selection pre..
does home made natural facial mask honey avocado lemon etc work better than these other mainstream beaty products loreal,dove,nutrogena facial maks.
A huge amount of water-- to L--moves from the blood into the bowel every day, through osmosis and digestive secretions. Since people only have L of blood, why don't they die from losing all the water from their blood into the bowel? What will the ..
A new drug was found to decrease Hepatitis B virus.What is the most possible explanation for the problem.
How is the villus the functional unit of the small intestine? What is the structure and function and the enzymes found there.
What is the function of viral integrase in the life cycle of aretrovirus?
q1.dnaa.is one of the adenosine phosphates.b.is one of the nucleotide coenzymes.c.contains protein-building
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