Which of the Following Statements is Correct

Question

Which of the following statements is correct?
A)Opsonization is a process that targets a pathogen for phagocytosis by covering it with soluble sugars.
B)The complement system includes a group of proteins that circulate in an inactive form and become activated when they detect molecular signatures of pathogens.
C)Mannose-binding lectin is a carbohydrate that is secreted by the liver.
D)Macrophages secrete monocytes.

Accepted Answer

The complement system is a group of proteins that circulate in an inactive form and become activated when they detect molecular signatures of pathogens. This system includes a cascade of proteins that work together to opsonize pathogens, recruit immune cells, and directly kill pathogens.

Answer: C
 Mannose-binding lectin is a carbohydrate-binding protein that is secreted by the liver. It is part of the innate immune system and plays a role in opsonization, which is the process of tagging pathogens for phagocytosis by immune cells like macrophages.

Answer: D
 The statement is incorrect. Macrophages are a type of immune cell that is derived from monocytes, not a cell that secretes monocytes.