Respuesta :

From 'Campbell Biology: AP Edition'
Ver imagen blake647

Definition:

The breakdown of glucose by enzymes, releasing energy and pyruvic acid.

Step 1:

Hexokinase breaks a phosphate off of an ATP, this ATP becomes ADP. This phosphate is added to the sixth Carbon of Glucose, which is Glucose-6-phosphate.

Step 2:

phosphoglucoisomerase isomerizes the Glucose-6-phosphate to turn it into Fructose-6-phosphate.

Step 3:

Phosphofructokinase breaks a phosphate off of another ATP. Phosphate attaches to sugar molecule and is now Fructose-1,6-biphosphate.

Stage 4:

Adolase splits this molecule UNEVENLY.


Stage 5:

Makes Glyceraldehyde-3-phosphate(G3P) and Dihydroxyacetone phosphate(DHP). DHP very unstable and is converted into G3P by isomerase immediately.


Stage 6:

Both G3P's: Glyceraldehyde-3-phosphate. Dehydrogenase rips hydrogens off of 3GPs and the 2 hydrogens are added to both NADs(NADs are reduced). There are now two 1,3-biphosphoglycerate.


Stage 7:

Phosphoglyceromutase removes a phosphate from each 1,3-biphosphoglycerate. These are added to ADPs, making 2 ATPs. Makes 2 3-phosphoglycerate.


Stage 8:

Phosphoglyceromutase shifts phosphate. Now there are two 2-phosphoglycerate.


Stage 9:

Enolase removes 2 H2O to make 2 Phosphoenolypurate(PEP)


Stage 10:

Pyruvatekinase removes phosphate from each making 2 ATPs. Molecules are now Pyruvate(CH3)