Which statements regarding the atp-adp cycle are true? atp synthesis takes place in the mitochondria of eukaryotic cells. atp is regenerated from adp through the process of phosphorylation. energy is stored in the covalent bonds between phosphates, with the greatest amount of energy in the bond between the second and third phosphate groups. most of the readily available energy stored in atp is stored during the manufacture of adenosine. the ribose sugar in the model above is the direct product of photosynthesis.

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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.