Identify the step in the tricarboxylic acid c | vedclass

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Question

(B) Oxidation involves the loss of electrons or hydrogen atoms from a substrate,which is typically coupled with the reduction of an electron carrier l

Vedclass · Accepted Answer

Succinyl-$CoA$ $\rightarrow$ Succinic acid

Vedclass · Answer

(B) Oxidation involves the loss of electrons or hydrogen atoms from a substrate,which is typically coupled with the reduction of an electron carrier like $NAD^+$ or $FAD$.In the tricarboxylic acid cycle ($TCA$ cycle):$1$. Isocitrate $\rightarrow \alpha$-ketoglutaric acid involves the reduction of $NAD^+$ to $NADH + H^+$.$2$. Succinic acid $\rightarrow$ Malic acid involves the reduction of $FAD$ to $FADH_2$.$3$. Malic acid $\rightarrow$ Oxaloacetic acid involves the reduction of $NAD^+$ to $NADH + H^+$.$4$. The conversion of Succinyl-$CoA$ to Succinic acid is a substrate-level phosphorylation step where $GDP$ (or $ADP$) is phosphorylated to $GTP$ (or $ATP$). This step does not involve the removal of electrons or hydrogen atoms from the substrate,hence it is not an oxidation reaction.

Identify the step in the tricarboxylic acid cycle,which does not involve oxidation of the substrate.

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