Question

1. How is oxaloacetate transported across the inner mitochondrial membrane?

2. List several metabolic fates of Glucose-6-phosphate. Why might the cell choose onepath over the other.

Answer 1

1)- it cannot cross inner mitochondrial membrane. It is transported through a settle system. It converted into inner mitochondrial space. In matrix malate is converted back into oxaloacetate.

2)- it has three fates- it is initial substrate for glycolysis.

It can be processed by pentose phosphate pathway to yield NADPH.

It can be converted into free glucose to release into blood.

Cell choose more than one to produce energy or to maintain homeostasis inside the cell.