Which of the following molecules are primarily used as energy sources by living organisms?

Which pair of molecules are primarily broken down by the cell to release energy during metabolism?

Which of the following molecules can donate electrons in metabolic reactions?

Which compound emulsifies fat in the small intestine during digestion?

Under what conditions is excess $\mathrm{glucose}$ converted to $\mathrm{fat}$ in the human body?

Which class of macromolecules plays a significant role in energy storage in biological systems?

What type of energy is stored in food molecules that is utilized during metabolism?

What type of energy is primarily stored in food molecules?

Which of the following describes the role that enzymes play in the process of metabolism?