Question

Antibodies are

A. proteins or polysaccharides usually found on the cell surface of invading bacteria or viruses
B. proteins that consist of two light and two heavy polypeptide chains
C. proteins circulating in the blood that tag foreign blood cells for complement-mediated lysis
D. proteins embedded in B-cell membranes
E. b,c,and d are correct
---I have chosen E...second opinions?

Answer 1

I really appreciate any opinions!

Answer 2

[AI-generated answer — Explain Bot]

I can confirm that your answer, E, is correct. Antibodies are indeed proteins or polysaccharides that can be found on the cell surface of invading bacteria or viruses (option A). They are also proteins consisting of two light and two heavy polypeptide chains (option B). Furthermore, antibodies are proteins circulating in the blood that tag foreign blood cells for complement-mediated lysis (option C), and they can be embedded in B-cell membranes (option D). Therefore, all three options B, C, and D are indeed correct, making option E the correct choice.