[Campbell Biology P.217] What is the primary advantage of cellular respiration's electron tr... | Practice Question

What is the primary advantage of cellular respiration's electron transport chain over an uncontrolled reaction like hydrogen combustion in releasing energy?

  • A: It produces heat and light more efficiently.
  • B: It stores all released energy directly as chemical bonds.
  • C: It allows energy to be harvested in smaller, usable steps for ATP synthesis.
  • D: It bypasses the need for oxygen as an electron acceptor.

Explanation

The text states that in cellular respiration, the electron transport chain breaks the 'fall' of electrons into a series of smaller steps, storing some of the released energy to make ATP, unlike the uncontrolled release as heat and light in a single explosive step.