Question

Which of the following statement regarding Innate immunity is wrong.
(A) The response time is minute to hours.
(B) The specificity of innate immunity is highly diverse.
(C) The major components of innate immunity are B cells and T cells.
(D) The major components of innate immunity are phagocytes.
Choose the correct answer from the options given below:

• (B) and (D) only.
• (B) and (C) only.
• (A) and (D) only.
• (A) and (C) only.

Hint:

To avoid confusion, create a simple mental table comparing Innate and Adaptive immunity. \textbf{Innate:} Fast, non-specific, no memory, cells like phagocytes. \textbf{Adaptive:} Slow, highly specific, has memory, cells are B and T lymphocytes.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Innate immunity is the body's first line of defense against pathogens. It is non-specific and provides a rapid response. Adaptive immunity, in contrast, is highly specific, has memory, and is slower to develop. The question asks to identify the incorrect statements about innate immunity.
Step 2: Detailed Explanation:
Let's analyze each statement:
(A) The response time is minute to hours. This is correct. The innate immune system is the rapid response system, acting immediately upon encountering a pathogen.
(B) The specificity of innate immunity is highly diverse. This is wrong. Innate immunity has limited and fixed specificity. It recognizes general patterns shared by many pathogens (called PAMPs - Pathogen-Associated Molecular Patterns). High diversity and specificity are the hallmarks of adaptive immunity.
(C) The major components of innate immunity are B cells and T cells. This is wrong. B cells and T cells are lymphocytes, which are the primary cells of the adaptive immune system.
(D) The major components of innate immunity are phagocytes. This is correct. Phagocytic cells like macrophages, neutrophils, and dendritic cells are key players in the innate immune response. They engulf and destroy pathogens.
Step 3: Final Answer:
The statements that are wrong regarding innate immunity are (B) and (C). Therefore, the correct option is (2).