A newly-generated T cell can recognize MHCs and is not self-reactive. What is its fate?
A) It is signaled for destruction via apoptosis.
B) It will migrate to the lymphoid tissues to await activation by its antigen.
C) It will undergo genetic shuffling to change its receptor to increase self-tolerance.
D) It will become part of an autoimmune attack in the body's tissues at some time in the future.
E) It will migrate to the bone marrow for screening for the ability to make antibodies against self-antigens.
Answer: B
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Analysis of a bacterial gene indicates that 24% of the nucleotides in the coding strand contain the base A, 18% contain the base T, 26% contain the base G, and 32% contain the base C. What percent of the nucleotides in the mRNA transcribed from this gene will contain the base U? (Enter your answer as a number only without the percent sign, e.g. enter 5 not5%.)
What will be an ideal response? Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about DNA and RNA? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
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