A) is a polar molecule.
B) is referred to as a universal solvent.
C) makes up over 70% of an organism.
D) is often a product or reactant in chemical reactions.
E) All of the answer choices are correct.

A) nucleotides.
B) phospholipids.
C) amino acids.
D) carbohydrates.
E) monosaccharides.

A) They may be part of the structure of bacteria.
B) They may serve as a source of food.
C) They contain carbon, hydrogen, and oxygen in a 1:2:1 ratio.
D) They may be bonded to proteins to form glycoproteins.
E) Cholesterol and ergosterol are examples of carbohydrates.