Question

which molecule is best described as energy rich because of the amount of energy that can be stored in it and released from it?
○ co₂
○ adp
○ h₂o
○ c₆h₁₂o₆

Explanation:

• \(CO_2\) (carbon dioxide) is a waste product of cellular respiration and does not store significant amounts of energy for the cell's use.
• \(ADP\) (adenosine diphosphate) can be converted to \(ATP\) (adenosine triphosphate) to store energy, but on its own, it is not the energy - rich molecule in terms of long - term energy storage.
• \(H_2O\) (water) is essential for many biological processes but does not store chemical energy in the way needed for the cell's energy - requiring activities.
• \(C_6H_{12}O_6\) (glucose) is a carbohydrate. Through cellular respiration (glycolysis, Krebs cycle, and oxidative phosphorylation), glucose is broken down. The chemical bonds in glucose store a large amount of energy. When these bonds are broken, the energy is released and can be used to produce \(ATP\), which is the cell's immediate energy source.

Answer:

\(C_6H_{12}O_6\)