Respiration- Glycolysis Flashcards
Where in the cell does Glycolysis take place?
The cytoplasm of the cell
How many molecules of ATP is generated for every glucose molecule that is used?
Two ATP molecules
The Glucose molecule is considered to be what when the two ATP molecules split and release phosphate that becomes attached to the glucose.
The glucose molecule is considered to be phosphorylated.
The ATP molecules split releasing phosphate which becomes attached to the glucose which results in the production of?
Fructose bisphosphate (fructose 1, 6- diphosphate)
Why must the phosphorylation of the glucose molecule occur?
It must be done in order to activate the glucose molecule so that it is more likely to participate in the reactions of glycolysis since phosphorylating the glucose also makes it impossible for the glucose to move out of the cell because the membrane is impermeable to fructose bisphosphate.
What is produced when fructose bisphosphate undergoes lysis?
Fructose bisphosphate splits into two 3-C sugar phosphate molecules (triose phosphate) which are isomers of each other.
After fructose bisphosphate splits into two isomers, triose phosphates, each isomer of triose phosphate undergoes what type of reaction?
Dehydrogenation in which two H atoms are removed and taken up by the hydrogen acceptor NAD (nicotinamide adenine dinucleotide).
When triose phosphate undergoes dehydrogenation, what happens to NAD?
NAD becomes reduced to NADH and H+.
What type of reaction also takes place when ADP incorporates phosphate from one of the intermediate compounds, and ATP is produced?
Substrate level phosphorylation.
As a result of substrate level phosphorylation, triose phosphate is converted to what?
Glycerate 3 phosphate
Glycerate 3 phosphate will then undergo further reactions to produced what?
Phosphoenol pyruvate (PEP)
What is removed from phosphoenol pyruvate?
A high energy phosphate molecule
What happens to the high energy phosphate molecule after it is removed from phosphoenol pyruvate?
It is taken up by ADP to produce another ATP molecule by substrate level phosphorylation.
After the removal of a high energy phosphate molecule, the PEP is converted to?
Pyruvate/pyruvic acid.
