Number of proteins belonging to complement system is
A
6
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B
18
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C
24
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D
30
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Solution
The correct option is D 30
The complement system is a part of the immune system that enhances (complements) the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism, promotes inflammation, and attacks the pathogen's plasma membrane.
The complement system consists of more than 30 proteins that are either present as soluble proteins in the blood or are present as membrane-associated proteins.
Hence number of proteins belonging to the complement system is 30.