Question

Read the following statements (A - D) having two mistakes.
A. The primary response shown during acquired immunity is due to the memory of immune system.
B. The principle of immunization is based on the property of 'memory' of the immune system.
c. Computed tomography (CT) uses UV rays to generate three - dimensional images of the internal organs.
Which are the two statement having mistakes ?

• A. statements B and C
• B. statements B and D
• C. statements A and D
• D. statements A and C

Answer 1

The correct option is D statements A and C

The primary immune response is seen as a result of the first exposure to a foreign antigen, no antibody is produced during this phase, but activated B cells are differentiating into plasma cells. So, memory response is not seen. Immunization is done on the principle of the memory of the immune system. On exposure of an immune system to an antigen, it generates an immune response and on subsequent exposure to the same antigen, a heightened immune response is generated due to the presence of memory B cells that can synthesize the antibodies easily. A CT scanner uses x-rays to take multiple images of areas inside the body. So, the correct option is 'statements A and C'.