Question

In some biochemical reaction, two redox equivalents in the form of hydrogen atoms come out from PGAL and transferred to NAD${}^{+}$, site of this process is

• A. Stroma of chloroplast
• B. Cytoplasm
• C. Mitochondrial matrix
• D. Outer membrane of mitochondria

Answer 1

Answer: (B)

Cytoplasm

The given reaction is one of the step of glycolysis. Glycolysis takes place in the cytoplasm of the cell. Two redox-equivalents in the form of two hydrogen atoms come out from PGAL (phosphoglyceraldehyde) and transferred to a molecule of NAD${}^{+}$. In this, PGAL is oxidized with inorganic phosphate to get form BPGA (biphosphoglyceric acid) and NADH${}_2$ is formed.

Thus, the correct answer is 'Cytoplasm'.