HUMAN PHYSIOLOGY
BREATHING AND RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is the oxidized form of glucose and contains little energy
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It is the oxidized form of glucose, yet contains high energy
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If pyruvate is formed in an anoxic environment, cellular respiration will occur in the mitochondria only
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If muscles are O2 deficient, they will use pyruvate for fermentation
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Detailed explanation-1: -Final answer: The correct statements are Pyruvate can be converted into ethanol and carbon dioxide by yeast and Fermentation is a form of anaerobic respiration . Hence, Option C is correct.
Detailed explanation-2: -When oxygen is not present, pyruvate will undergo a process called fermentation. In the process of fermentation the NADH + H+ from glycolysis will be recycled back to NAD+ so that glycolysis can continue.
Detailed explanation-3: -In anaerobic conditions, pyruvate converts to lactate through anaerobic glycolysis. Anaerobic respiration results in the production of 2 ATP molecules.
Detailed explanation-4: -In the presence of oxygen, pyruvate is converted to acetyl-CoA and then enters the citric acid cycle. More ATP can be formed from the breakdown of glucose when oxygen is present.