Multiple Choice
Which macromolecule is primarily responsible for storing large amounts of energy in living organisms?
1. A Review of General Chemistry
Intro to Organic Chemistry
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In the process of fermentation, which molecule is recycled to allow glycolysis to continue?
A
Glucose
B
NAD+
C
ATP
D
Pyruvate
Verified step by step guidance1
Understand the process of glycolysis: Glycolysis is the metabolic pathway that converts glucose into pyruvate, releasing energy and producing ATP and NADH in the process.
Identify the role of NAD+ in glycolysis: During glycolysis, NAD+ is reduced to NADH as it accepts electrons. This is crucial for the continuation of glycolysis as it helps in the oxidation of glucose.
Recognize the need for recycling NAD+: For glycolysis to continue, NAD+ must be regenerated from NADH. This is because NAD+ is required to accept electrons in the glycolytic pathway.
Connect fermentation to NAD+ recycling: In anaerobic conditions, fermentation occurs to regenerate NAD+ from NADH, allowing glycolysis to proceed. This is done by converting pyruvate into lactate or ethanol, depending on the organism.
Conclude the importance of NAD+ in fermentation: The recycling of NAD+ during fermentation is essential for the continuation of glycolysis, ensuring that cells can produce ATP even in the absence of oxygen.
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