What Protein Provides Flexibility and Strength to Connective Tissues

Question

What protein provides flexibility and strength to connective tissues?
A) actin
B) collagen
C) keratin
D) fibrinogen
E) myosin

Accepted Answer

Collagen is the main protein in connective tissues, such as tendons, ligaments, and cartilage. It provides both flexibility and strength to these tissues. Actin, myosin, fibrinogen, and keratin are important proteins in muscles, blood clotting, and skin, respectively, but do not provide the same properties to connective tissues as collagen.