The final electron acceptor in aerobic respiration is ________.

Which of the following compounds has the greatest amount of energy for a cell?

a. CO₂

b. ATP

c. glucose

d. O₂

e. lactic acid

Why do human cells require oxygen? Select all relevant statements.

a. To carry out glycolysis

b. To carry out fermentation

c. To carry out cellular respiration

d. To oxidize fats

e. To carry out substrate-level phosphorylation

f. To carry out oxidative phosphorylation

g. To carry out photophosphorylation

Rank the following from the most ATP that could be made to the least ATP that could be made:

a. 1 glucose molecule processed via a fermentation pathway (consider that glycolysis is the first stage of the process)

b. A lipid made of glycerol and three 10-carbon fatty acid chains entering cellular respiration

c. 1 glucose molecule entering the Entner–Doudoroff pathway

d. 1 glucose molecule entering cellular respiration

Under ideal conditions, the complete aerobic oxidation of one molecule of glucose by a bacterium allows a net gain of how many ATP molecules?

a. 2

b. 4

c. 38

d. 0

Label the mitochondrion to indicate the location of glycolysis, the citric acid cycle, and electron transport chains.

Label the diagram below to indicate acetyl-CoA, electron transport chain, FADH2, fermentation, glycolysis, citric acid cycle, NADH, and respiration. Indicate the net number of molecules of ATP that could be synthesized at each stage during bacterial respiration of one molecule of glucose.

Complete the following chart:

The main coenzymes that carry electrons in catabolic pathways are _______ and ________.

Why do we breathe oxygen and give off carbon dioxide?