Question

Energy, in the form of electrons, captured by electron carriers (e.g. NADH) is usable as is and does not need to be converted into another form.

1) True
2) False

Answer 1

The claim that energy in the form of electrons from carriers such as NADH is directly usable without conversion is false. NADH must pass through the electron transport chain to gradually release energy that the cell can use, mainly in the form of ATP.

Step-by-step explanation:

The statement that energy, in the form of electrons, captured by electron carriers such as NADH, is usable as is and does not need to be converted into another form, is false. Energy carriers like NADH and FADH2 hold high-energy electrons but the energy they contain is not immediately usable in this form. Instead, these electrons must pass through the electron transport chain (ETC), which is a series of redox reactions that release energy incrementally. This energy released is then used to create a proton gradient that drives the synthesis of adenosine triphosphate (ATP) in a process known as oxidative phosphorylation. Only through this conversion can the energy stored in electron carriers be used by the cell for various functions, most notably through the molecule ATP.