True or False?

The statement "all immunogens are antigen but reverse is not true" is true.

Explanation:

To understand this statement, we must first define what is an immunogen and what is an antigen.

What are immunogens?

Immunogens are substances that can stimulate an immune response. They are usually proteins or large molecules that the immune system recognizes as foreign and triggers an immune response against them. Immunogens are used to develop vaccines that can protect individuals against infectious diseases.

What are antigens?

Antigens are substances that can react with antibodies or immune cells. They can be immunogens or non-immunogens. Antigens can be proteins, carbohydrates, lipids, or any other molecule that can be recognized by the immune system.

Relation between immunogens and antigens:

All immunogens are antigens because they can stimulate an immune response. However, not all antigens are immunogens because they may not be able to stimulate an immune response.

For example, blood group antigens are not immunogens because they do not stimulate an immune response. However, they can react with antibodies and cause blood transfusion reactions.

Conclusion:

In summary, the statement "all immunogens are antigen but reverse is not true" is true because all immunogens can stimulate an immune response and are therefore antigens. However, not all antigens can stimulate an immune response and are therefore not immunogens.