Question

On sensitization, activated B-lymphocytes multiply to form clone of specific ........, which in turn produce ...........

• A. cytotoxic T-cells, B-perforins
• B. plasma cells, B-antibodies
• C. plasma cells, B-antigens
• D. memory T-cells, B-lymphokines

Hint:

Activated B-lymphocytes differentiate into plasma cells, which are responsible for producing antibodies to fight specific pathogens.

Answer 1

The Correct Option is B

Step 1: Understanding B-lymphocyte activation.
When B-lymphocytes are activated, they proliferate and differentiate into plasma cells. These plasma cells secrete antibodies that are specific to the antigen that triggered the immune response.
Step 2: Analyzing the options.
(A) cytotoxic T-cells, B-perforins: Incorrect. Cytotoxic T-cells and B-perforins are not directly involved in this process.
(B) plasma cells, B-antibodies: Correct. Activated B-lymphocytes differentiate into plasma cells, which produce antibodies.
(C) plasma cells, B-antigens: Incorrect. Plasma cells produce antibodies, not antigens.
(D) memory T-cells, B-lymphokines: Incorrect. Memory T-cells are involved in long-term immunity, but they do not directly produce antibodies.
Step 3: Conclusion.
The correct answer is (B) plasma cells, B-antibodies, as B-lymphocytes differentiate into plasma cells that produce antibodies.