Which is the energy biomolecule for all living things?

carbohydrates

Explanation:

Carbohydrates are compound made up of carbon, hydrogen and oxygen. They are formed during photosynthesis in the chloroplast of green plants. They are build from four different types of unit including: monosaccharides, disaccharides and polysaccharides.

The carbohydrates are storage forms of food. Plants store food in form of starch while animals it is stored in form of glycogen. They are also components of structures that provide mechanical support in organisms. For example, cellulose in the plant cell walls, chitin in the exoskeleton and lignin in xylem vessels and tracheids.

In presence of water, hydrolysis occurs and glucose is formed which can be oxidized by respiratory enzymes to provide energy.

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.