Question

Which one of the following statements is correct with respect to immunity?

• A. Preformed antibodies need to be injected to treat the bite by a viper snake
• B. Antibodies are protein molecules, each of which has four light chains
• C. Rejection of a kidney graft is the function of B-lymphocytes
• D. The antibodies against smallpox pathogen are produced by T – lymphocytes

Answer 1

The correct option is A

Preformed antibodies need to be injected to treat the bite by a viper snake

The correct option is A.

Explanation for the correct option:

1. Anti-venom is an antibody-based medication used to treat venomous bites.
2. Anti-Snake venom is made up of purified and concentrated immunoglobulins that were extracted from the serum of healthy horses that had been inoculated against the venoms of poisonous snakes.
3. The anti-venom counteracts the venom's respiratory effects.
4. When preformed antibodies are administered directly to the body, artificial passive immunity results. It provides an immediate immunological reaction.
5. So, the treatment for a viper snake bite requires the injection of preformed antibodies.

Explanation for the incorrect options:

Option B:

1. Immunoglobulins, a class of immune system-related proteins, are antibodies.
2. Four polypeptides, two heavy chains, and two light chains are linked to create a "Y"-shaped molecule that makes up each antibody.

Option C:

1. Graft rejection occurs when the recipient's immune system attacks the donated graft and begins destroying the transplanted tissue or organ.
2. The immune response is usually triggered by the presence of the donor's own unique set of HLA proteins, which the recipient's immune system will identify as foreign.
3. T cells are central to the process of transplant rejection.

Option D:

1. The human body creates antibodies in response to the antigen.
2. Depending on how strong the immune reaction is, the antibodies react against the antigen.

Final answer: Preformed antibodies need to be injected to treat the bite by a viper snake is the correct statement with respect to immunity.