Immune System
Which of the following proteins would not need localization signal?

A cell surface protein
A protein bound to the endoplasmic reticulum (ER) membrane
A nuclear protein
A cytosolic protein

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Immune System
Which of the following statements is false regarding B cells?

B cells can undergo class switching and produce a different antibody type
B one marrow stem cells migrate to the thymus and develop into B cells
B cells synthesize antibodies and put them on their cell surface
B cells that recognize high concentrations of antigens (self) in the absence of other signals undergo apoptosis in the bone marrow

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