Cellular respiration is the process of breaking down organic molecules into usable energy for cellular processes....

Cellular respiration is the process of breaking down organic molecules into usable energy for cellular processes.

Why isn’t glucose broken down in one step to make ATP?

What is the equation for cellular respiration?

What are the major steps in cellular respiration?

Expert Solution

a) breakdown of glucose releases large amount of energy if glucose is oxidized in a single step, the energy released cannot be captured into the anhydride bonds of ATP.

free energy change of oxidation of glucose is -2840 kJ/mol.

this large amount of energy released once can damage cell as well.

b) glucose is oxidized to carbon dioxide and oxygen is reduced to water with the production of ATP, about 36 ATPs are produced per glucose.

C6H12O6+ 6CO2+ 36ADP+ 36Pi 6CO2+ 6 H2O + 36 ATP

c) major steps in cellular respiration are

glycolysis: glucose is converted to pyruvate.

pyruvate oxidation: pyruvate is converted to acetyl CoA

TCA cycle: acetyl CoA is oxidized to Carbon dioxide.

electron transport chain: NADH, FADH2 produced during these processes are oxidized and using the energy of electrons H+ from the matrix is pumped to intermembrane space, creating an H+ gradient, then ATP synthease makes ATP using the energy of H+ gradient.

gladiator answered 2 years ago

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