Figure 9.3
-Which of the protein complexes labeled with Roman numerals in Figure 9.3 will transfer electrons to O₂?
A) complex I
B) complex II
C) complex III
D) complex IV
E) All of the complexes can transfer electrons to O₂.

Question

Figure 9.3
-Which of the protein complexes labeled with Roman numerals in Figure 9.3 will transfer electrons to O₂?
A) complex I 
B) complex II 
C) complex III 
D) complex IV 
E) All of the complexes can transfer electrons to O₂.

Quizplus · Accepted Answer

Complex IV, also known as cytochrome c oxidase, is the complex that transfers electrons to O₂, reducing it to H₂O. The other complexes participate in the electron transport chain but do not directly transfer electrons to O₂.

Figure 9.3 -Which of the Protein Complexes Labeled with Roman Numerals in Numerals