During aerobic respiration, oxygen is: a. formed. b. reduced. c. oxidized. d. catabolized. e....
Question:
During aerobic respiration, oxygen is:
a. formed.
b. reduced.
c. oxidized.
d. catabolized.
e. decarboxylated.
The Mitochondrion
The mitochondrion is the site of eukaryotic oxidative metabolism. Mitochondria vary considerably in size and shape depending on the cell type and metabolic state. The outside of the mitochondrion is bounded by a smooth outer membrane and contains an extensively invaginated inner membrane, called cristae. The proteins mediating electron transport and oxidative phosphorylation are associated with the inner mitochondrial membrane. The inside of the mitochondrion is referred to as the matrix and contains a high concentration of citric acid cycle enzymes, as well as mitochondrial DNA, RNA and ribosomes.
Answer and Explanation: 1
Aerobic respiration uses oxygen as a final electron acceptor to produce ATP.
The aerobic metabolism of glucose is approximately 19 times more efficient than its anaerobic breakdown, making aerobic respiration the preferred method of energy generation in the cell.
Chemical reaction for the aerobic metabolism of glucose:
C{eq}_6 {/eq}H{eq}_1 {/eq}{eq}_2 {/eq}O{eq}_6 {/eq} + 38ADP + 38P{eq}_i {/eq} + 6O{eq}_2 {/eq} {eq}- {/eq}{eq}> {/eq} 6CO{eq}_2 {/eq} + 44H{eq}_2 {/eq}O + 38ATP
In this equation, oxygen (O{eq}_2 {/eq}) is a reactant. O{eq}_2 {/eq} is reduced to H{eq}_2 {/eq}O by cytochrome C oxidase, using four electrons supplied from the electron transport chain.
Therefore, the answer is b.
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