Match the following antibodies with the correct definition.     

____IgD     

____IgM     

____IgG     

____IgA     

____IgE

a. Antibody found in secretions

b. Most common antibody; crosses the placenta

c. Antibody involved in allergies and parasitic infections

d. Pentamer and potent agglutinating agent

e. Antibody bound to the B cell plasma membrane

Video transcript

Hey, everyone. Let's take a look at this question together which of the following antibodies is matched incorrectly to its function. And here we have four different answer choices containing four different antibodies and a function. And we have to determine which of the following answer choices contains an antibody that is matched incorrectly to its function. Or if all of the options are correctly matched, starting on with answer choice A which says the antibody IgM and its function is that it is the first line of defense against an infection, which we know that the antibody IgM is the first line of defense against an infection. As IgM is the first antibody produced during the initial stages of an immune response, which means that answer choice A contains an antibody that is correctly matched to its function. So answer choice A cannot be the correct answer. Next. We have answer choice B which says the antibody IgG has the function of providing defense against parasitic infections. Well, we know that the antibody IgG is not primarily involved in providing defense against a parasitic infection. As the antibody, IgG is primarily involved in providing long term immunity against bacterial and viral infections. So answer choice B contains an antibody that is matched incorrectly to its function. So answer choice B is the correct answer since we are looking for an antibody that is matched incorrectly to its function. And IgG does not provide defense against parasitic infections. And instead, IgG is primarily involved in providing long term immunity against bacterial and viral infections. So answer choice B is the correct answer and all other answer choices are incorrect. As answer choice C the antibody IG A is matched correctly to its function which says that it protects mucus membranes. As IG A is found in high concentrations in mucus membranes to protect these mucosal surfaces. And in choice D which says the antibody IgE is involved in allergic reactions, which is the correct function of IgE. As IgE triggers the release of histamine to cause those allergic symptoms. So answer choice B is the only answer, choice containing an antibody matched incorrectly to its function. So answer choice B is the correct answer. I hope you found this video to be helpful. Thank you and goodbye.