Question

Mitochondrial cristae are sites of

• A. Breakdown of macromolecules
• B. Protein synthesis
• C. Phosphorylation of flavoproteins
• D. Oxidation-reduction reactions

Answer 1

Answer: (D)

Oxidation-reduction reactions

• The mitochondria is a double-membraned cell organelle, known as the powerhouse of the cell which is present in all eukaryotic cells.
  
• The inner mitochondrial membrane has folds called cristae which helps in increasing the surface area.
  
• The inner mitochondrial membrane is embedded with the enzyme ATP synthase (ATP synthesis), succinate dehydrogenase (oxidation-reduction reaction) and is also the site of the electron transport chain (aerobic respiration).
• So, the correct answer is 'Oxidation-reduction reactions'.