What is the main difference between complex 1 and complex 2?

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Solution

Electron Transport System:
The metabolic pathway of electron transport is called as electron transport system or ETS.
It is a series of protein compounds where it makes use of electrons from electron carrier to develop a chemical gradient.
It leads to the creation of ATP in a complete system named oxidative phosphorylation.
The compound ubiquinone combines first and second complexes.
Both complex I and complex II transfer electrons to ubiquinone, which in turn transfers the electrons to complex III.
Complex I of ETS Complex II of ETS
1. Complex I is NADH dehydrogenase. 1. Complex II is succinate dehydrogenase.
2. It accepts high energy electrons from NADH and pumps 4 protons from the matrix to the intermembrane space. 2. It converts succinate to fumarate and generates FADH₂in the Krebs cycle.
3. The two electrons are carried to the first complex aboard NADH. 3. It directly gets FADH₂ and the two electrons from complex I and delivers it to ETS.

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Complex I of ETS	Complex II of ETS
1. Complex I is NADH dehydrogenase.	1. Complex II is succinate dehydrogenase.
2. It accepts high energy electrons from NADH and pumps 4 protons from the matrix to the intermembrane space.	2. It converts succinate to fumarate and generates FADH₂in the Krebs cycle.
3. The two electrons are carried to the first complex aboard NADH.	3. It directly gets FADH₂ and the two electrons from complex I and delivers it to ETS.