Fundamentholfundamenthol
NEET2022Biology
Q.

Select the incorrect statement with respect to acquired immunity.

  1. A

    Primary response is produced when our body encounters a pathogen for the first time.

  2. B

    Anamnestic response is elicited on subsequent encounters with the same pathogen.

  3. C

    Anamnestic response is due to memory of first encounter.

  4. D

    Acquired immunity is non-specific type of defence present at the time of birth.

Solution

Acquired immunity is pathogen-specific and develops only after exposure to specific antigens. It is not present at the time of birth and is not non-specific.

Statement (4) confuses acquired immunity with innate immunity, which is the non-specific defence present from birth. Hence statement (4) is incorrect.

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