SAT Subject Biology Practice Question 272: Answer and Explanation
2. End product of anaerobic metabolism in muscle cells
D. Lactic acid
Correct Answer: D
D When muscle cells run out of oxygen and switch to anaerobic metabolism (glycolysis only) to make ATP, the end product is lactic acid. Yeast can also switch to anaerobic metabolism; their end product is ethanol. You should have been able to eliminate choices A and B because they are not products.