| Fermentation | Aerobic Respiration |
|---|---|
| $(1)$ Glucose is partially broken down into ethanol or lactic acid. | $(1)$ Glucose is completely oxidized into $CO_{2}$ and $H_{2}O$. |
| $(2)$ Only $2$ net molecules of $ATP$ are produced per glucose molecule. | $(2)$ $A$ large amount of $ATP$ molecules are produced. |
| $(3)$ Oxidation of $NADH$ to $NAD^{+}$ is a slow process. | $(3)$ Oxidation of $NADH$ to $NAD^{+}$ occurs rapidly. |
| $(4)$ It is a relatively simple process. | $(4)$ It is a complex process involving multiple pathways like the Krebs cycle and $ETC$. |
| $(5)$ Occurs primarily in microorganisms like yeast and some bacteria. | $(5)$ Occurs in most higher organisms. |
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