BIOL: Ch. 6 Quiz

The electron transport chain is, in essence, a series of redox reactions that conclude cellular respiration. During these redox reactions,

NAD+ is reduced, which then oxidizes an electron acceptor in the electron transport chain.

A muscle cell deprived of molecular oxygen will convert glucose to lactic acid to

recycle NADH through fermentation.

During glycolysis, a molecule of glucose is partially oxidized. What is the net gain of ATP and NADH for each glucose molecule?

2 ATP and 2 NADH

In the first stage of cellular respiration, two molecules of pyruvate are produced. In the remaining stages, a number of products are produced, including ___. These stages occur in the ___.

CO2...mitochondria

What is the purpose of embedding the electron transport chain in the membrane of a cell?

The membrane is impermeable to H+.

What is the fate of the electrons that are stripped from glucose duirng cellular respiration?

They are used to form water.

Cellular respiration completely breaks down a glucose molecule through glycolysis and the citric acid cycle. However, these two processes yield only a few ATPs. The majority of the energy the cell derives from glucose is

found in NADH and FADH2.

Primarily, cellular respiration serves to

make ATP to power the cell's activities.

The electron transport chain is a series of electron carrier molecules. In eukaryotes, where can this structure be found?

mitochondria

Fat is the most efficient molecule for long-term energy storage, even compared to carbohydrates, because

with their numerous hydrogen atoms, fats provide an abundant source of high-energy electrons.