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Question
The product of anaerobic respiration in muscles is:
Options:
A .  Alcohol   
B .  Lactic acid 
C .  Water         
D .  Carbon dioxide    
Answer: Option B
:
B
Our muscles generally respire aerobically. During heavy exercises, the demand for energy in these cells arehigh butthe supply of oxygen to produce energy is limited. In such situations, the muscle cells turn toanaerobic respirationto fulfil the energy demands. The anaerobic breakdown of glucose produces lactic acid in muscles.

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