A chemist, during the course of an analysis, runs across a chemical composed of carbon, hydrogen, and oxygen in the proportion 1:2:1 and having a six-sided molecular shape. It is probably (a) a...

A chemist, during the course of an analysis, runs across a chemical composed of carbon, hydrogen, and oxygen in the proportion 1:2:1 and having a six-sided molecular shape. It is probably (a) a pentose, (b) an amino acid, (c) a fatty acid, (d) a monosaccharide, (e) a nucleic acid.

The following equation, which represents the oxidative breakdown of glucose by body cells, is a reversible reaction.

 Glucose + oxygen - carbon dioxide + water + ATP

(a) How can you indicate that the reaction is reversible?

(b) How can you indicate that the reaction is in chemical equilibrium?

(c) Define chemical equilibrium.