Which two elements make up the greatest percentages by mass in earth’s crust? (1) oxygen and potassium (2) oxygen and silicon (3) aluminum and potassium (4) aluminum and silicon

Do the following statements describe actin, myosin, both of the proteins or neither of the proteins? (a) contains a binding site for calcium (b) found in the i band (c) exists in a globular (g) form and a filamentous (f) form (d) contains a binding site for atp (e) is a component of the thin filament (f) is a component of the thick filament