Which enzymes of the citric acid cycle are missing from the glyoxylate cycle?

Step by Step Solution: Step 1. The citric acid cycle and the glyoxylate cycle are two different metabolic pathways that operate in different cellular compartments Step 2. The citric acid cycle takes place in the mitochondrial matrix while the glyoxylate cycle takes place in the glyoxysome, a specialized form of peroxisome Step 3. Although both cycles share some enzymes, there are two enzymes in the citric acid cycle that are missing from the glyoxylate cycle. These enzymes are Succinate Dehydrogenase and Aconitase. Step 4. In the glyoxylate cycle, these two enzymes are replaced by two other enzymes, Isocitrate Lyase and Malate Synthase. Step 5. Thus, the glyoxylate cycle is a modified version of the citric acid cycle, which allows some organisms to synthesize carbohydrates from acetyl-CoA in the absence of glucose. Final Answer: Succinate Dehydrogenase and Aconitase are missing from the glyoxylate cycle.