Open Question
Indicate whether each statement is true or false. If the statement is false, change the underlined word or phrase to make the statement true.
_____ ABO blood group antigens are found on nucleated cells.
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20. Adaptive Immunity
Antigens
Multiple Choice
Which of the following best describes an antigen?
A
A protein produced by B cells that binds specifically to pathogens
B
A chemical substance used to kill bacteria on surfaces
C
A type of white blood cell that engulfs pathogens
D
A molecule that is recognized by the immune system and can trigger an immune response
Verified step by step guidance1
Understand the definition of an antigen: An antigen is any molecule or molecular structure that can be recognized by the immune system and can trigger an immune response.
Review the options given and identify key terms: Look for descriptions involving recognition by the immune system or triggering immune responses.
Eliminate options that describe other immune components or unrelated substances, such as proteins produced by B cells (which are antibodies), chemicals that kill bacteria (disinfectants), or white blood cells that engulf pathogens (phagocytes).
Focus on the option that describes a molecule recognized by the immune system and capable of triggering an immune response, as this matches the definition of an antigen.
Conclude that the best description of an antigen is a molecule recognized by the immune system that can trigger an immune response.
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