GK
SOIL AND AGRICULTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Glycolysis occurs only in the-
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Presence of Oxygen
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Absence ofOxygen
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Both (a) and (b)
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None of these
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Explanation:
Detailed explanation-1: -During the absence of oxygen (anaerobic conditions) and in the cells lacking mitochondria, anaerobic glycolysis prevails. The pyruvate is reduced to lactate as NADH is reoxidized to NAD+ by lactate dehydrogenase. This process is an important source of ATP for cells that lack mitochondria such as erythrocytes.
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. In the process of glycolysis, NAD+ is reduced to form NADH + H+.
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