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Which of the following describes the sequence of electron carriers in the electron transport chain, starting with the least electronegative?

FMN, Fe•S, ubiquinone, cytochromes (Cyt)

Exposing inner mitochondrial membranes to ultrasonic vibrations will disrupt the membranes. However, the fragments will reseal "inside out." These little vesicles that result can still transfer electrons from NADH to oxygen and synthesize ATP. If the membranes are agitated still further however, the ability to synthesize ATP is lost. After the first disruption, when electron transfer and ATP synthesize still occur, what must be present?

all of the electron transport proteins as well as ATP synthase

Each time a molecule of glucose (C6H12O6) is completely oxidized via aerobic respiration, how many oxygen molecules (O2) are required?


Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed during glycolysis?


It is possible to prepare vesicles from portions of the inner membrane of the mitochondrial components. Which one of the following processes could still be carried on by this isolated inner membrane?

oxidative phosphorylation

In liver cells, the inner mitochondrial membranes are about 5 X the area of the outer mitochondrial membranes, and about 17 X that of the cell's plasma membrane. What purpose must this serve?

It increases the surface for oxidative phosphoryation.

What happens at the end of the chain?

4 electrons combine with oxygen and protons.

Which of the following occurs in the cytosol of a eukaryotic cell?

glycolysis and fermentation

Starting with one molecule of glucose, the "net" products of glycolysis are

2 NADH, 2 H+, 2 pyruvate, 2 ATP, and 2 H2O.

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