Question

1. what causes energy to be released during cellular respiration? (2 pts)

a cells store extra oxygen
b breaking chemical bonds releases energy
c glucose turns into oxygen

Explanation:

• Option A: Cells do not store extra oxygen for energy release in cellular respiration; oxygen is used in the process, not stored.
• Option B: In cellular respiration, energy is released when chemical bonds in glucose (and other molecules) are broken (and new bonds form in products like CO₂ and H₂O). Breaking bonds in the reactants (along with forming new bonds in products) releases energy.
• Option C: Glucose is broken down, and oxygen is a reactant, not a product of glucose transformation. Glucose reacts with oxygen, not turns into it.

Answer:

B. Breaking chemical bonds releases energy