Antigens are present :
Correct answer: D. On cell surface
- A. Inside the cytoplasm
- B. On nuclear membrane
- C. Inside the nucleus
- D. On cell surface
Explanation
An antigen is any foreign substance, such as a protein or polysaccharide, present on the external coating of a pathogen, a component of vegetables, fruits, meats, drugs, chemicals, tissues, or organ transplants, which induces the immune system to produce antibodies.
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