Which of the following is true about elements? A.
Elements combine to form compounds in organisms but not in nonliving substances.
B.
Elements do not combine to form compounds.
C.
Elements combine to form compounds in nonliving substances but not in organisms.
D.
Elements combine to form compounds in organisms and nonliving substances.

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