Is electron transport involved in both lactic acid and alcohol fermentation?

No, electron transport is not involved in either lactic acid or alcohol fermentation. Both processes are anaerobic, meaning they occur in the absence of oxygen and do not utilize the electron transport chain. Instead, they rely on substrate-level phosphorylation to generate ATP, using NADH produced during glycolysis to reduce pyruvate into lactic acid or acetaldehyde into ethanol.