Glycolysis & Link Reaction Flashcards
Does Glycolysis need oxygen?
No - it is the only phase of cellular respiration that can take place without without oxygen. So it is anaerobic
Where does Glycolysis take place?
The cytoplasm
There are two phases to Glycolysis, what are they?
The investment phase and pay off phase.
What are the 3 sugar molecules made during glycolysis?
Hexose Bisphosphate
Triose Phosphate
Pyruvic Acid
What is the initial molecule used at the start of Glycolysis?
Glucose
What is glucose formula
C6H12O6
What happens during the investment phase?
2 ATP are added to the Glucose making it Hexose Bisphospahte.
The Hexose Bi phosphate is then split into 2 molecules of Triose Phosphate.
What happens during the Pay off phase?
Triose Phosphate now looses hydrogens creating the molecule Pryuvic Acid.
The hydrogen’s are removed by hydrogen/electron carrier NAD making it NADH+ H+
This reaction also creates 4 ATP making a net gain of 2 ATP.
What happens to the 2 pryvate molecules produced in Glycolysis?
These are now transported by the link reaction to the matrix of the mitochondria.
What happens in the Link reaction?
Pryruvate loose another carbon molecule by way of CO2.
More hydrogen atoms are removed by a NAD carrier making NADH+ H+
Co enzyme A joins with the new 2 carbon molecule Acetate, making Acetyl CoA
What goes into the link reaction and what compounds come out of the Link Reaction?
In: 1 Pyruvic Acid & 1 CoA
Out: 1 Acetyl CoA, 1 NADH+H+ & 1 CO2
REMEMBER this cycle happens twice
Where does the link reaction take place?
inner membrane
What happens to Pryuvate if no O2 is present?
It gets converted into lactic acid which then gets used as energy.
