AP BIOLOGY

CELL RESPIRATION

OXIDATIVE PHOSPHORYLATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Catalyzes the oxidation of succinic acid to form fumarate and the reduction of coenzyme Q10 to ubiquinone (QH2).
A
NADH-Coenzyme Q Oxidoreductase
B
Succinic-Coenzyme Q Oxidoreductase
C
Coenzyme Q-cytochrome C Reductase
D
Cytochrome c Oxidase
Explanation: 

Detailed explanation-1: -The Succinate Dehydrogenase (SDH) heterotetrameric complex catalyzes the oxidation of succinate to fumarate in the tricarboxylic acid (TCA) cycle and in the aerobic respiratory chains of eukaryotes and bacteria.

Detailed explanation-2: -Succinate dehydrogenase (SDH) or succinate-coenzyme Q reductase (SQR) or respiratory complex II is an enzyme complex, found in many bacterial cells and in the inner mitochondrial membrane of eukaryotes. It is the only enzyme that participates in both the citric acid cycle and the electron transport chain.

Detailed explanation-3: -Complexes I and II both produce reduced coenzyme Q (CoQH2). Two electrons that are transported from NADH to CoQ are coupled to the transport of four protons across the membrane.

Detailed explanation-4: -Abstract. Coenzyme Q (CoQ, ubiquinone) is the electron-carrying lipid in the mitochondrial electron transport system (ETS). In mammals, it serves as the electron acceptor for nine mitochondrial inner membrane dehydrogenases.

There is 1 question to complete.