Proteins are an integral part of-
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A.
Cell membrane
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B.
All of the options
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C.
Antibodies
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D.
Enzymes
Correct Answer:
B. All of the options
Explanation:
Proteins are essential components of all the listed biological structures and functions. They are permanently embedded in the lipid bilayer of cell membranes to facilitate transport and signaling, act as antibodies to defend the immune system against pathogens, and serve as enzymes to catalyze nearly every chemical reaction within a cell. Because proteins fulfill all these critical roles, "All of the options" is the correct answer.
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