For Each of the Following Sentences, Fill in the Blanks

For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below.Not all words or phrases will be used; each word or phrase may be used more than once.
$\begin{array}{lllll}\text { ADP } & \mathrm{FADH}_{2} & \mathrm{H}^{+} & \text {moderately } & \text { protons } \\\text { ATP } & \text { favorable } & \text { higher } & \mathrm{NADH} & \text { severely } \\\text { cytosol } & \text { glucose } & \text { lower } & \mathrm{NAD}^{+} & \text {slightly } \\\text { electrons } & \text { GTP } & \text { matrix } & \mathrm{P}_{i} & \text { unfavorable }\end{array}$

High-energy electrons are transferred through a series of molecules, and the energy released during these transfers is used to generate a gradient of __________, or __________.Because their concentration is __________ outside than inside the mitochondria, the flow of __________, or __________, down the concentration gradient is energetically very __________ and can thus be coupled to the production of ATP from ADP.Thus, oxidative phosphorylation refers to the oxidation of __________ and __________ molecules and the phosphorylation of __________.Without this process, the yield of ATP from each glucose molecule would be __________ decreased.