When it comes to carbohydrates, the following statements apply:
a) are polysaccharides - Correct; some carbohydrates, like starch and glycogen, are polysaccharides, which are long chains of sugar units.
b) store energy - Correct; carbohydrates are a major energy source for the body and can be stored as glycogen or fat.
c) are made from carbons, hydrogens, and oxygens - Correct; carbohydrates generally follow the formula (CHâ‚‚O)n, where n is the number of carbon atoms.
d) are synthesized through peptide bonding - Incorrect; carbohydrates are not synthesized through peptide bonding. Peptide bonds are specific to proteins. Carbohydrates are formed through glycosidic bonds.
So, the correct choices are a, b, and c.