Glycolysis

The word "Glycolysis" simply means "The breakdown/splitting up of Glucose".

- "Lysis" - Splitting up

- "Glyco" - Glucose

. In this reaction we will be splitting up glucose to make a compound called Pyruvate.

. It goes through 2 stages before finishing as Pyruvate.

. Glycolysis takes place in the cytoplasm of the cell.

. It is the first stage of respiration - the one that will be shown is aerobic respiration as oxygen is used! (Oxygen used as part of splitting up glucose by water H20).

1.Glucose is first converted into TP.

2. Glucose is a 6 carbon molecule and TP is a 6 carbon molecule.

3.The products made at this stage are: 2 ADP

 (ATP gets converted into ADP) 

(4. Glucose is split up by using water {hydrolysis})

Glucose  -----------------------------------  TP 
  (6C)         2 ATP ---------> 2 ADP       (6C)

1. This stage is where TP is then converted to Pyruvate.

2. TP is a 6 carbon molecule and Pyruvate is a 3 carbon molecule.

3. The products made in this stage of the reaction are: 2 ATP
                                                                                      2 NADH 

(4. This is an oxidation reaction because TP becomes oxidised {loses hydrogen})

For the purpose of fitting the reaction on one page, I've drawn the reaction once - The TP's split into two branches where one ATP and NADH is made on each branch resulting in 2 Pyruvates being formed on both branches.

                     
            ADP---------> ATP (x 2) 

2 x TP   -----------------------------------------    Pyruvate 
(6C)     NAD+ ------> NADH + H+ (x 2)     (3C) x 2 

1. Main product produced: Pyruvate - there are 2 and each has 3 carbons.

2. Product produced in Stage 1: TP

3. 4 ATP's are made
    2 NADH's are made 

4. Net gain of 2 ATP, because 2 ATP are being used up in the reaction (Glucose to TP) and 2 ATP are produced (TP to Pyruvate).

5. This whole reaction takes place in the cytoplasm of the cell.