NEET Biology Respiration In Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Answer: (c)

During glycolysis pyruvic acid is produced from glucose and is oxidatively decarboxylated to form acetyl CoA. This formation of acetyl CoA from pyruvic acid needs a multienzyme complex and 5 essential cofactors, i.e. lipoic acid, CoA, $Mg^{2+}$, NAD and TPP (thiamine pyrophosphate). It results in production of 2 molecules of $CO_2$ and 2 molecules of $NADH_2$ . This acetyl CoA enters mitochondria and is completely oxidised during Krebs' cycle. Thus acetyl CoA acts as the linker of glycolysis and Krebs' cycle.