How many of the following of mitochondrial inner membrane not only involved as electron carriers but also as proton pumps during electron transport of aerobic respiration of plants?
A. Complex I
B. Complex II
C. Complex III
D. Complex IV
E. Complex V

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Three

Two

Five

Four

answer is B.

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Detailed Solution

Complex I, Complex III and Complex IV carry not only electrons but also pump protons from matrix to perimitochondrial space. Complex II is only electron carrier but not protons. Complex V is involved in oxidative phosphorylation and transports protons by facilitated diffusion from perimitochondrial space to matrix.

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