Which of the Following Statements Are True of Antibodies (Select

question 3

Multiple Choice

Which of the following statements are true of antibodies (Select all that apply) ?

• A)Antibodies destroy antigens by penetrating their cell membranes.
• B)The only class of antibodies that can cross the placenta is IgM.
• C)The IgA class of antibodies is found on mucous membranes and in breast milk.
• D)Antibodies render toxins harmless because they change the shape of the toxins.
• E)Antibodies label foreign antigens,and such a label stimulates phagocytosis by macrophages.
• F)Antibodies are effective against viruses because they disable the nucleic acid of the virus.

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