Question

Inner mitochondrial membrane possesses which of the following set of enzymes?
A. ATP-synthase, succinate dehydrogenase and respiratory chain enzymes
B. NADH-cytochrome Reductase and monomeric oxidase
C. Malate and isocitrate dehydrogenases, fumarate, aconitase and citrate synthase
D. Adenylate kinase and nucleoside diphosphokinase

Answer 1

Hint: Proteins account for approximately 80% of the content of the inner mitochondrial membrane, which has major consequences for the processes from which developmental and evolutionary mitochondrial specializations occur.

Complete Answer:
- Mitochondria are organelles which are rare. They serve as the cell's power plants, are enclosed by two membranes, and use their own genome.
- They also differentiate independently of the cell they live in, meaning that cell division is not associated with mitochondrial replication.
- Any of these characteristics are mainstays from the ancient mitochondrial ancestors, who were presumably prokaryotes that lived openly.

Now, let us find the solution from the option.
- The inner membrane of the mitochondria is the origin of the electron transport chain (aerobic respiration), which comprises enzymes in the respiratory chain.
- Embedded in the inner mitochondrial membrane, the enzyme ATP synthase assists in the synthesis of the ATP molecule (cell’s energy currency).
- Succinate dehydrogenase is a member of the respiratory complex II located in the inner mitochondrial membrane and accountable for converting succinate to fumarate in the production of citric acid.

Thus, the correct option is (A) ATP-synthetase, succinate dehydrogenase and respiratory chain enzymes.

Note: The inner mitochondrial membrane is the habitat for the OXPHOS proteins, and the proteins are packed very tightly within the membrane.