researcher found a method she could use to manipulate and quantify phosphorylation and methylation in embryonic cells in culture. In one set of experiments, she succeeded in increasing acetylation of histone tails in the chromatin of the cells. Which of the following results would she most likely see in these cells?

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#Question id: 1978

#Unit 4. Cell Communication and Cell Signaling

In which of the following situations will helper T cells be activated?

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#Question id: 1979

#Unit 4. Cell Communication and Cell Signaling

An immunoglobulin (Ig) molecule, of whatever class, has regions symbolized as C or V, H or L. A light chain has which of these regions?

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#Question id: 1980

#Unit 4. Cell Communication and Cell Signaling

For one person to produce over a million different antibody molecules could not possibly require over a million different genes. Instead, this variability is accounted for by which processes?

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#Question id: 1981

#Unit 4. Cell Communication and Cell Signaling

Which of the following is accounted for by immunological memory?

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#Question id: 1982

#Unit 4. Cell Communication and Cell Signaling

These cells are involved in cell-mediated immunity, and they respond to class I MHC molecule-antigen complexes:

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#Question id: 1983

#Unit 4. Cell Communication and Cell Signaling

These cells are involved in innate immunity, and a person lacking these cells may have a higher than normal chance of developing malignant tumors: