15. Two functions of proteins are:
a. Enzymes: Facilitate chemical reactions.
b. Immune response: Antibodies.
c. Cell Recognition: Cell surface proteins.
d. Transport: Hemoglobin (oxygen transport
in blood).
e. Motion: Muscle fibers.
f. Hormones: Insulin- regulates blood
sugar levels.
g. Structure: Protein fibers in hair,
nails, cartilage, cell membranes, etc.
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Slichter