AP BIOLOGY

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CELL RESPIRATION

OXIDATIVE PHOSPHORYLATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following statements are TRUE about the process that occurs in cristae? I ATP is synthesized by ATP synthase on the inner membrane of mitochondrion II FADH2 transfers its hydrogen atoms to the succinate dehydrogenase III Formation of water molecule IV Production of ATP in the electron transport chain is called oxidative phosphorylation
A
I, II and III
B
I, II and IV
C
I, III and IV
D
I, II, III and IV
Explanation: 

Detailed explanation-1: -Mitochondria are involved in different cellular functions, but they are essentially responsible for cellular ATP production through the so-called oxidative phosphorylation (OXPHOS). This process occurs in the inner mitochondrial membrane (IMM) in specific dynamic membrane invaginations called cristae.

Detailed explanation-2: -Answer and Explanation: The electron transport chain occurs in the cristae of the mitochondria.

Detailed explanation-3: -ATP synthase forms rows of dimers in crista membranes. The mitochondrial F1-Fo ATP synthase is the most conspicuous protein complex in the cristae. The ATP synthase is an ancient nanomachine that uses the electrochemical proton gradient across the inner mitochondrial membrane to produce ATP by rotatory catalysis [34].

Detailed explanation-4: -To increase the capacity of the mitochondrion to synthesize ATP, the inner membrane is folded to form cristae. These folds allow a much greater amount of electron transport chain enzymes and ATP synthase to be packed into the mitochondrion.

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