Question:

How many ATP are produced when one molecule of $FADH_2$ is oxidized to $FAD$ through Electron Transport System?

Updated On: Aug 23, 2023
  • $2$
  • $3$
  • $1$
  • $4$
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The Correct Option is A

Approach Solution - 1

The number of ATP molecules synthesised depends on the nature of the electron donor. Oxidation of one molecule of NADH gives rise to 3 molecules of ATP, while that of one molecule of $FADH_2$ produces 2 molecules of ATP.
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Approach Solution -2

It results in the formation of 2 ATP. ETC is a protein complex that is embedded in the inner mitochondrial membrane. As the electron passes through FADH2 proton gradient is generated and ATP is synthesised. Both FADH2 and NADPH are produced during the cycle of respiration. FADH2 bypasses the first complex I.

So, the correct answer is (A): 2

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Concepts Used:

Respiration in Plants

Respiration in plants is a process that entails the production of energy in plants. This process can simply be described as the intake of Oxygen and the release of Carbon Dioxide as an outcome of the oxidation of complex organic compounds. Though plants do not have any specific organ to balance the process of respiration, their stems, roots, and leaves do this work at a very low rate than other living beings. The process of respiration is very crucial for the plants to sustain the growth of the plant tissues.

This process can be stated as-

\[C_6H_{12}O_6 + 6O_2 → 6CO_2 + 6H_2O + \text{Energy}\]