Which of the following accurately represents how intermediate filaments differ from actin filaments and microtubules? a. only intermediate filaments associate with motor proteins. b. only intermediate filaments are composed of the same protein subunits in all cells. c. only intermediate filaments play a purely structural role. d. only intermediate filaments are polar with plus and minus ends.

i don’t no. suiopgohjk

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.