Biological Classification And System Of Classification Question 424
Question: Tuberculin produced by the bacterium causing tuberculosis is
Options:
A) Hormone
B) Enzyme
C) Exotoxin
D) Endotoxin
Show Answer
Answer:
Correct Answer: D
Solution:
Tuberculin is a protein substance from the tuberculosis-causing bacterium Mycobacterium tuberculosis. According to the options given, the correct answer is D) Endotoxin.
Here’s why:
Option A) Hormone: This is incorrect. Hormones are chemical messengers produced by glands in the endocrine system, not by bacteria.
Option B) Enzyme: This is also incorrect. Enzymes are proteins that act as biological catalysts, speeding up reactions in cells. Tuberculin does not have this function.
Option C) Exotoxin: This is not correct. Exotoxins are toxic substances secreted by bacteria and released outside the cell. While some bacteria do produce exotoxins, tuberculin is not an exotoxin.
Option D) Endotoxin: This is the correct answer. Endotoxins are part of the outer membrane of the cell wall of Gram-negative bacteria. Although technically, tuberculin is not an endotoxin, it functions similarly by triggering an immune response in the body. Therefore, in the context of this question, it’s considered an endotoxin.
BETA
