Question:
During ETS, when ubiquinol is oxidized by the cytochrome \(bc_{1}\) complex, the electrons released are transferred to ____.
During ETS, when ubiquinol is oxidized by the cytochrome \(bc_{1}\) complex, the electrons released are transferred to ____.
Show Hint
Complex III passes electrons to the small mobile carrier cytochrome c.
Updated On: Nov 12, 2026
- Cytochrome a
- Cytochrome \(a_{3}\)
- Cytochrome C
- Molecular oxygen
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
In the electron transport system, ubiquinol (reduced ubiquinone) gives electrons to complex III, the cytochrome \(bc_{1}\) complex.
Step 2: Next carrier
Complex III passes the electrons to cytochrome c, a small mobile protein on the outer face of the inner mitochondrial membrane.
Step 3: Further path
Cytochrome c then carries the electrons to complex IV (cytochromes \(a\) and \(a_{3}\)), which finally reduces oxygen.
Final Answer:
The electrons are transferred to cytochrome c. \[ \boxed{\text{(C) }\text{Cytochrome C}} \]
In the electron transport system, ubiquinol (reduced ubiquinone) gives electrons to complex III, the cytochrome \(bc_{1}\) complex.
Step 2: Next carrier
Complex III passes the electrons to cytochrome c, a small mobile protein on the outer face of the inner mitochondrial membrane.
Step 3: Further path
Cytochrome c then carries the electrons to complex IV (cytochromes \(a\) and \(a_{3}\)), which finally reduces oxygen.
Final Answer:
The electrons are transferred to cytochrome c. \[ \boxed{\text{(C) }\text{Cytochrome C}} \]
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