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Question
The diagram represents a central process of catabolism. Step I indicates
The diagram represents a central process of catabolism. Step I indicates
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Solution
The correct option is D Glycolysis
Glycolysis (I) is the first step of cellular respiration that breaksdown glucose into two molecules of pyruvic acid independent of presence or absence of oxygen. The pyruvic acid is then decarboxylated into acetyl CoA and enters Kreb cycle/TCA cycle (II) where in it is aerobically broken down; the pathway takes place in mitochondrial matrix. Electron transport chain (III) includes downhill flow of electrons from NADH and FADH2 to final electron acceptor (Oxygen) through a chain of membrane-bound carriers to facilitate the uphill transport of protons across a proton-impermeable membrane. Since inner mitochondrial membrane is impermeable to protons; protons can reenter the matrix only through Fo particles of ATP synthase. The proton-motive force that drives protons back into the matrix provides the energy for ATP synthesis. Correct answer is D.
Glycolysis (I) is the first step of cellular respiration that breaksdown glucose into two molecules of pyruvic acid independent of presence or absence of oxygen. The pyruvic acid is then decarboxylated into acetyl CoA and enters Kreb cycle/TCA cycle (II) where in it is aerobically broken down; the pathway takes place in mitochondrial matrix. Electron transport chain (III) includes downhill flow of electrons from NADH and FADH2 to final electron acceptor (Oxygen) through a chain of membrane-bound carriers to facilitate the uphill transport of protons across a proton-impermeable membrane. Since inner mitochondrial membrane is impermeable to protons; protons can reenter the matrix only through Fo particles of ATP synthase. The proton-motive force that drives protons back into the matrix provides the energy for ATP synthesis. Correct answer is D.
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