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Which of these steps in Krebs’ cycle indicates substrate level phosphorylation?

a)

Conversion of succinyl acid to -ketoglutaric acid

b)

Conversion of succinic acid to malic acid

c)

Conversion of succinyl Co-A to succinic acid

d)

Conversion of malic acid to oxalo acetic acid


Question ID - 5054 | Toppr Answer

Which of these steps in Krebs’ cycle indicates substrate level phosphorylation?

a)

Conversion of succinyl acid to -ketoglutaric acid

b)

Conversion of succinic acid to malic acid

c)

Conversion of succinyl Co-A to succinic acid

d)

Conversion of malic acid to oxalo acetic acid

1 Answer - 5876 Votes

3537

Answer Key : (c) -

(c)

During the conversion of Succinyl Co-A to Succinic acid, a molecule of GTP is synthesized. This is a substrate level phosphorylation. In a coupled reaction, GTP is converted to GDP with the simultaneous synthesis of ATP from ADP.



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