Which of the following enzyme catalyses the isocitrate-to-alpha-ketoglutarate conversion?

The correct answer is: Aldolase

• Isocitrate dehydrogenase is an enzyme that catalyzes a process inside the citric acid cycle, as it produces alpha-ketoglutarate, carbon dioxide, NADH, and a proton from isocitrate and NAD+.
• The following are examples of the reactions that each of the other enzymes listed catalyzes within glycolysis rather than within the citric acid cycle.
• Phosphoenolpyruvate and ADP are changed into pyruvate and ATP by the enzyme pyruvate kinase.
• Glyceraldehyde-3-phosphate dehydrogenase catalyzes the transformation of 1,3-bisphosphoglycerate, NADH, and a proton from glyceraldehyde-3-phosphate, NAD+, and inorganic phosphate.
• 1,3-bisphosphoglycerate and ADP are changed into 3-phosphoglycerate and ATP by phosphoglycerate kinase. 2-phosphoglycerate is transformed into phosphoenolpyruvate by enolase.