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Substrate level phosphorylation occurs d...

Substrate level phosphorylation occurs during which step of Krebs' cycle

A

Succinyl`CoA rarr` Succinic acid

B

Isocitric acid `rarr` Oxalosuccinic acid

C

Oxalosuccinic acid `rarr alpha-`ketoglutaric acid

D

Malic acid `rarr OA A`

Text Solution

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The correct Answer is:
A
During Krebs' or citric acid cycle, succinyl-CoA is acted upon by enzyme sucinyl-CoA synthese to form succinate (a 4 C compound). The reaction releases sufficient energy to form ATP (in plants) or GTP (in animals) by substrate level phosphorylation GTP can form ATP through a coupled reaction
`"Succiny CoA + GDP/ADP +H"_(3)PO_(4) underset("synthetase")overset("Succinyl CoA")(hArr) "Succinate + CoA + GTP/ATP"`
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NCERT FINGERTIPS-RESPIRATION IN PLANTS-Respiration In Plants
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