In animals, lactate forms from fermentation. Lactate ________.
A) can be used to produce additional ATP
B) is toxic and causes muscle to fatigue
C) is stored in the muscle for future energy use
D) converts into carbon dioxide and is released in the blood stream
E) can be used as an energy source in animals

Question

Quizplus · Accepted Answer

During fermentation in animal cells, the pyruvate formed by glycolysis accepts two hydrogen atoms and is reduced to lactate. Notice in Figure 7.11 that 2 NADH pass hydrogen atoms to pyruvate, reducing it. It is beneficial for pyruvate to be reduced to lactate when oxygen is not available because this reaction regenerates NAD+, which can then pick up more electrons during the earlier reactions of glycolysis. This keeps glycolysis going, during which ATP is produced by substrate-level ATP synthesis.

In Animals, Lactate Forms from Fermentation. Lactate ________