question_answer 20)

  Match the following columns.

Column I	Column II
A. Molecular oxygen	1. ketoglutraic acid (1)
B. Electron acceptor	2.Hydrogen acceptor (a)
C. Pyruvate dehydrogenase	3. Cytochrome-c (b)
D. Decarboxylation	4. Acetyl Co-A (c)

Codes       AB C D                              A B C D (a) 2 3 4 1                         (b) 3 4 2 1 (c) 2 1 3 4                        (d)  4 3 1 2

Answer:

                (a) Molecular oxygen ultimately combines with hydrogen to form water at the end of Electron Transport Chain (ETC). Cytochrome-c is an electron acceptor in ETS. Pyruvate dehydrogenase catalyses reaction converting pyruvic acid into acetyl Co- A. Decarboxylation oxalosuccinate forms a-ketoglutaric acid in a decarboxylation reaction.