Pick the correct electron transport complex (I-V) for all of the following: a) C
ID: 67132 • Letter: P
Question
Pick the correct electron transport complex (I-V) for all of the following:
a) Contains FMN ______ b) cytochrome c acts as the oxidizing agent ______
c) Pumps 2 protons/electron pair ______ d) Does not contain an iron/sulfur center _______
e) inhibited by rotenone _______ f) oxidizes CoQH _________
g) reduces CoQ _______ h) Does not pump protons ________
i) phosphorylates ADP _________ j) Contains copper ________
(please explain)
Explanation / Answer
Complex I (NADH-Co Q reductase) contains FMN as prosthetic group.
Cytochrome c acts as the oxidising agent in complex III (Co-cytochrome c reductase).
Complex IV pumps 2electron /electron pairs from thr matrix.
Complex IV does not iron-sulphur centre, it includes copper ion as prosthetic group.
Rotenone, a plant product inhibits the transfer of electrons through Complex I.
Complex III oxidizes CoQH by gaining the electrons transferred by complex I and Complex II.
Complex I and Complex II reduces CoQ.
Complex II does not pump protons.
Complex V (ATP synthase) utilizes the energy dissipated by electron transport and proton transport across the inner mitochondrial membrane. The concerned action generates an electrochemical gradient for protons, with a lower pH value outside the inner membrane than inside. The energy tapped by allowing protons to flow back across the membrane and down this gradient, through the enzyme ( ATP synthase). ATP synthase uses this energy to generate ATP from ADP in a phosphorylation reaction.
Complex IV contains copper.