AP BIOLOGY

CELL RESPIRATION

THE KREBS CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In eukaryotes, electron transport occurs in the
A
inner mitochondrial membrane (matrix)
B
nucleus
C
cell membrane
D
cytoplasm
Explanation: 

Detailed explanation-1: -The electron transport chain is a series of proteins and organic molecules found in the inner membrane of the mitochondria.

Detailed explanation-2: -The mitochondrial electron transport chain (ETC) consists of five protein complexes integrated into the inner mitochondrial membrane. The TCA cycle in the mitochondrial matrix supplies NADH and FADH2 to the ETC, each of which donates a pair of electrons to the ETC via Complexes I and II respectively.

Detailed explanation-3: -In eukaryotes, the electron transport chain is located in the inner mitochondrial membrane. In prokaryotes, it is located within the plasma membrane. Electrons move through the electron transport chain from a higher to lower energy state.

Detailed explanation-4: -The inner mitochondrial membrane transduces energy through oxidative phosphorylation, the main process responsible for the production of energy in the form of ATP in eukaryotic cells (Saraste, 1999).

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