The actin and myosin that make up muscle cells are made primarily of which type of macromolecule

Protein is the type of macromecule that primarily make-up muscle cells. Protein is one of the most important macromolecule that serves as building blocks of any tissues that are found in different kinds of organisms. Aside from building, these proteins are also responsible for tissue repair.

This type of galaxy is an approximately ellipsoidal shape and a smooth, nearly featureless image. they are the largest single star systems, in the universe and are built by the collisions of many smaller galaxies.

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