The molecules used and produced in the Kreb cycle as depicted by a and b respectively are:
Kreb cycle, also called tricarboxylic acid cycle, is a series of enzymatic reactions that occurs in all aerobic organisms.
The Kreb cycle involves the oxidative metabolism of acetyl units, and serves as the main source of cellular energy.
Kreb cycle makes use of pyruvate as reactant and produces ATP, NADPH, FADH2 as products.
Learn more about kreb cycle at: https://brainly.com/question/13153590
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