Question

cellular respiration model analysis
model 4 - anaerobic respiration
glycolysis
glucose
2nad+
2nadh
2adp + 2p
2atp + water
2 pyruvic acid
no available oxygen
some bacteria and mammal muscle
yeast
2 lactic acid (lactic acid fermentation)
or
2 ethanol + 2 co₂ (alcohol fermentation)

1. there are two processes depicted above that occur after glycolysis. both of them start with the same reactant. what is the reactant of these processes?
2. what process has to happen before both alcoholic fermentation and lactic acid fermentation?
3. alcoholic fermentation utilizes atp to turn pyruvate (pyruvic acid) into what 2 products?
4. does alcoholic fermentation utilize oxygen(o₂) as a reactant?
5. lactic acid fermentation utilizes atp to turn pyruvate (pyruvic acid) into what product?
6. does lactic acid fermentation utilize oxygen?
7. in what type of organisms does lactic acid fermentation occur?
8. in what type of organisms does alcoholic fermentation occur?

Explanation:

1. After glycolysis, both lactic - acid fermentation and alcohol fermentation start with pyruvic acid as the reactant.
2. Glycolysis must occur before both alcoholic and lactic - acid fermentation.
3. Alcoholic fermentation turns pyruvate into ethanol and carbon dioxide.
4. Alcoholic fermentation is anaerobic and does not use oxygen as a reactant.
5. Lactic - acid fermentation turns pyruvate into lactic acid.
6. Lactic - acid fermentation is anaerobic and does not use oxygen.
7. Lactic - acid fermentation occurs in some bacteria and mammal muscle.
8. Alcoholic fermentation occurs in yeast.

Answer:

1. Pyruvic acid
2. Glycolysis
3. Ethanol and carbon dioxide
4. No
5. Lactic acid
6. No
7. Some bacteria and mammal muscle
8. Yeast