• Created by: Aishwarya
  • Created on: 17-11-13 12:33


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).

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Stage 1

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: ADP

 (ATP gets converted into ADP) 

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

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

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Stage 2

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

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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.

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Diagram summary


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