Question

A Krebs cycle intermediate, which act as a raw material for chlorophyll production is synthesized after

• A. Condensation
• B. Substrate level phosphorylation
• C. Hydration
• D. Dehydrogenation

Answer 1

The correct option is D Dehydrogenation

Succinyl coenzyme A is utilized in the synthesis of porphyrin rings, used in heme manufacture and chlorophyll biosynthesis. It is synthesized from α-ketoglutarate by α-ketoglutarate dehydrogenase through oxidative decarboxylation. During this process, coenzyme A is added, and H${}^{+}$ and CO${}_2$ are released along.

α-Ketoglutarate + NAD${}^{+}$ + CoA-SH → Succinyl-CoA + NADH + H${}^{+}$ + CO${}_2$

So, the correct option is 'Dehydrogenation'.