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MHT CET 202622 AprilEvening Shift
Exam
MHT CET
Year
2026
Date
22 April
Shift
Evening Shift
Subject
Biology
Chapter
Respiration in Plants

MHT CET 2026 · 22 April · Evening Shift · Biology · Respiration in Plants

During ETS, when ubiquinol is oxidized by the cytochrome bc_1...

During ETS, when ubiquinol is oxidized by the cytochrome bc1bc_1 complex, the electrons released are transferred to ____.

Options

  1. ACytochrome a
  2. BCytochrome a3a_3
  3. CCytochrome C
  4. DMolecular oxygen

Correct answer

C. Cytochrome C

Step-by-step solution

In the mitochondrial electron transport system (ETS), ubiquinol is oxidized by the cytochrome bc1bc_1 complex (Complex III).

During this oxidation, the electrons are transferred to cytochrome c, which is a small mobile protein attached to the outer surface of the inner mitochondrial membrane.

Cytochrome c then acts as a mobile carrier to transfer these electrons between Complex III and Complex IV (cytochrome c oxidase complex, which contains cytochromes a and a3a_3).

Answer: Cytochrome C
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