Which enzymes in the citric acid cycle catalyze oxidative decarboxylation reactions?

In the citric acid cycle (also known as Kreb’s Cycle), the enzyme that catalyzes oxidative decarboxylation reactions is α-Ketoglutarate dehydrogenase. The oxidative decarboxylation reaction is the irreversible stage of the citric acid cycle; it generates NADH (equivalent of 2.5 ATP), and regenerates the 4C chain (CoA is excluded).

the answer is b. 0; 4

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]