Class Xii Biology - Topic - Respiration

Glycolysis Cycle :

(Glycon = glucose; lysis = spliiting or breakdone)

Glycolysis takes place in cytoplasm hence also called as cytoplasmic respiration.It is common pathway for aerobic as well as anaerobic respiration.Various steps involved in glycolysis are  controlled by specific enzymes.

Glycolysis is defined as the stepwise ,enzymatic breakdown of the hexose sugar (glucose )into two molecules of pyruvate in cytoplasm .

Various reactions involved in glycolysis are as follows ;

1.Phosphorylation I

2.Isomerisation

3.Phosphorylation II

4.Cleavage

5.Isomerisation

6.Oxidation and phosphorylation

7.ATP generation I

8.Isomerisation

9.Dehydation and 10 .ATP Generation -II AS CAN BE SEEN IN FOLLOWING FLOWCHART

GLYCOLYSIS ends with formation of pyruvate and after acetylation enters as acetyl Co- A In the Krebs cycle. Therefore, formation of acetyl Co-A or acetylation of pyruvate is called connecting link between glycolysis and Kreb's cycle or Link reaction.