Question

Which of the following is most appropriate for aerobic respiration?

• A. $\mathrm{Glucose}\stackrel{\mathrm{Mitochondria}}{\to }\mathrm{Pyruvate}\stackrel{\mathrm{Cytoplasm}}{\to }{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}+\mathrm{energy}$
• B. $\mathrm{Glucose}\stackrel{\mathrm{Cytoplasm}}{\to }\mathrm{Pyruvate}\stackrel{\mathrm{Mitochondria}}{\to }{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}+\mathrm{energy}$
• C. $\mathrm{Glucose}\stackrel{\mathrm{Cytoplasm}}{\to }\mathrm{Pyruvate}+\mathrm{energy}\stackrel{\mathrm{Mitochondria}}{\to }{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$
• D. $\mathrm{Glucose}\stackrel{\mathrm{Cytoplasm}}{\to }\mathrm{Pyruvate}+\mathrm{energy}\stackrel{\mathrm{Mitochondria}}{\to }\mathrm{CO}+{\mathrm{H}}_2\mathrm{O}+\mathrm{energy}$

Answer 1

The correct option is C

$\mathrm{Glucose}\stackrel{\mathrm{Cytoplasm}}{\to }\mathrm{Pyruvate}+\mathrm{energy}\stackrel{\mathrm{Mitochondria}}{\to }{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$

The correct option is C.

The explanation for the correct option:

1. The breakdown of glucose in the presence of oxygen is aerobic respiration.
2. The by-product of aerobic respiration is water and carbon dioxide.
3. The generation of energy takes place within the mitochondria of the cells in the form of ATP (adenosine triphosphate).

The following are the steps of aerobic respiration:

1. Glycolysis: The process occurs within the cytoplasm and produces 3C pyruvate.
2. Krebs cycle: It takes place within the mitochondria in which the conversion of pyruvate takes place into Acetyl CoA and releases energy in the form of NADH.
3. Electron transport chain: It is a series of four protein complexes, which couple redox reactions, giving rise to an electrochemical gradient that results in the formation of ATP. It takes place within mitochondria. The by-products of the electron transport chain are water and carbon dioxide.

Final answer: $\mathrm{Glucose}\stackrel{\mathrm{Cytoplasm}}{\to }\mathrm{Pyruvate}+\mathrm{energy}\stackrel{\mathrm{Mitochondria}}{\to }{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$ is most appropriate for aerobic respiration.