What parallels can you identify in the properties and effects of epinephrine and the plant hormone auxin?

Epinephrine in animals and auxin in plants act as hormones that triggers specific cellular responses that vary among different tissues of the organism. The biosynthesis of epinephrine involves breaking just one carbon-carbon bond in the amino acid tyrosine, Synthesizing epinephrine requires breaking the bond between the carboxyl group (COOH) and the α-carbon in tyrosine.

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.

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