When a B cell differentiates into a plasma cell, it goes from expressing membrane-bound IgM to making mostly the secreted form of IgM. A deletion of the first polyadenylation (Secretory coding) site in the μ heavy chain gene would prevent activated B cells from making the secreted form of IgM.

B cells bind to carbohydrates and proteins

Antibodies have non-flexible arms that bind antigen

Donald Trump’s administration quickly discarded all EXCEPT which of the following long-standing principles of U.S. foreign policy?

Which major issue has troubled Italian society in the 2000s and 2010s?

Which of the following best describes the origins of ISIS/ISIL?

The East German leader Erich Honecker was most noted for which of the following?

Which of the following best describes Blitzkrieg doctrine?

What effect did the Meiji Restoration in Japan have?

How is the Solidarity movement in Poland best described?