Question

true or false 1 point if a molecule accepts electrons, it has been reduced. true false 13 multiple choice 1 point lactic acid and ethanol fermentation differ in that: fadh2 is oxidized to fadh in lactic acid fermentation, but nadh is oxidized to nad+ in ethanol fermentation. ethanol fermentation produces atp by substrate level phosphorylation, but lactic acid fermentation does not. nadh is oxidized to nad+ in lactic acid fermentation, but fadh2 is oxidized to fadh in ethanol fermentation. ethanol fermentation produces co2 as a byproduct, but lactic acid fermentation does not. lactic acid fermentation produces atp by substrate level phosphorylation, but ethanol fermentation does not. 14 multiple choice 1 point which of the following processes produces the highest number of reduced electron carriers and thus the greatest amount of atp by oxidative phosphorylation? glycolysis pyruvate oxidation the citric acid cycle glycolysis and the citric acid cycle are tied for atp production none of the other answer options is correct. 15

Explanation:

1. When a molecule accepts electrons, it gains negative - charge carriers. In redox reactions, gaining electrons is called reduction. So, if a molecule accepts electrons, it has been reduced.
2. In lactic - acid fermentation, NADH is oxidized to NAD+ to regenerate NAD+ for glycolysis to continue. In ethanol fermentation, NADH is also oxidized to NAD+ but FADH2 is not involved in lactic - acid fermentation, and ethanol fermentation produces CO2 as a by - product while lactic - acid fermentation does not.
3. The citric acid cycle and oxidative phosphorylation (which is closely related to the citric acid cycle) produce the highest number of reduced electron carriers (NADH and FADH2) which are then used in oxidative phosphorylation to produce a large amount of ATP. Glycolysis and pyruvate oxidation produce fewer reduced electron carriers compared to the citric acid cycle.

Answer:

1. True
2. Ethanol fermentation produces CO2 as a by - product, but lactic acid fermentation does not.
3. The citric acid cycle