Question

Assertion (A): Secondary immune response is quicker and stronger than the primary immune response.

Reason (R): Our body appears to have the memory of the first encounter therefore response to the subsequent encounter with the same pathogen is quick.

विकल्प

• Both (A) and (R) are true and (R) is the correct explanation of (A).

• Both (A) and (R) are true, but (R) is not the correct explanation of (A).

• (A) is true, but (R) is false.

• (A) is false, but (R) is true.

Answer 1

Both (A) and (R) are true and (R) is the correct explanation of (A).

Explanation:

It takes time for our body to identify and create antibodies to a pathogen (bacteria or virus) when it first comes into contact with it. On the other hand, the human immune system retains knowledge about the infection in memory cells. The body quickly identifies and eliminates the pathogen if it assaults again. Both statements are true because the explanation clearly explains why the secondary immune response is quicker.