10. Five functions of proteins include:
a. Transport proteins (hemoglobin transports
oxygen).
b. Defensive proteins (antibodies- immune
response)
c. Hormonal proteins (insulin- regulates
glucose concentration in blood)
d. Contractile proteins (Actin &
myosin in muscles help them contract)
e. Structural proteins (Collagen &
elastin fibers make up tendons, ligaments & cartilage)
f. Enzymatic proteins (catalyze reactins
in cells)
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Slichter