Apparent magnitude is

a. the brightness of a star compared to our sun
b. the brightness of a star as it appears from the earth without the effect of the atmosphere
c. the brightness of a star as it appears during the day
d. the brightness of a star as it appears in certain telescopes

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