Question

Select the incorrect statement with respect to acquired immunity:

• A. Primary response is produced when our body encounters a pathogen for the first time.
• B. Anamnestic response is elicited on subsequent encounters with the same pathogen
• C. Anamnestic response is due to memory of first encounter
• D. Acquired immunity is non-specific type of defense present at the time of birth

Answer 1

The Correct Option is D

Selecting the incorrect statement involves understanding the characteristics of acquired immunity. Acquired immunity is a specific type of immune response that our body develops after being exposed to various pathogens. Here is a summary of the statements with explanations:

• Primary response is produced when our body encounters a pathogen for the first time.
  This statement is correct. The primary immune response activates upon the first encounter with a pathogen, forming antibodies specific to that pathogen.
• Anamnestic response is elicited on subsequent encounters with the same pathogen.
  This statement is correct. The anamnestic response, or secondary immune response, occurs faster and more efficiently upon re-exposure to the same pathogen, due to the presence of memory cells.
• Anamnestic response is due to memory of first encounter.
  This statement is correct. Memory cells formed during the primary response enable the anamnestic response by quickly recognizing and responding to previously encountered pathogens.
• Acquired immunity is non-specific type of defense present at the time of birth.
  This statement is incorrect. Acquired immunity is specific and developed after birth through exposure to pathogens, unlike innate immunity, which is non-specific and present at birth.

The incorrect statement is: Acquired immunity is non-specific type of defense present at the time of birth.