question_answer

The pyruvic acid formed in glycolysis  is  oxidized to \[C{{O}_{2}}\] and \[{{H}_{2}}O\] in a cycle called

A)  Calvin cycle                       

B)  Hill reaction

C)  Krebs cycle                       

D)  Nitrogen cycle

Correct Answer: C

Solution :

Krebs cycle has been named after the Energy scientist Hans Krebs discovered it in 1948-1949 and won Nobel Prize for his work in 1953. The respiration starts with glucose. In aerobic and anaerobic respiration initial reactions are common as a result of which pyruvic acid is formed by breakdown of glucose. This process is called glycolysis. If \[{{O}_{2}}\] is present there, a complete oxidation of pyruvic acid into \[{{H}_{2}}O\] and \[C{{O}_{2}}\] and a chemical reaction occurs called Tri-carboxylic Acid (TCA) cycle.