Carbohydrates 3 Flashcards
1
Q
Where does glycolysis occur?
A
Cytosol
2
Q
Preparatory phase
A
1 glucose –> 2 G3P
2 ATP used
3
Q
What steps are irreversible?
A
1,3 and 10
4
Q
Catalyst of step 1
A
Hexokinase
5
Q
After what step are you committed to glycolysis?
A
3
6
Q
Step 10
A
PEP–> pyruvate using pyruvate kinase
7
Q
Where is NADH produced?
A
Steps 6 - 2NADH
8
Q
Where is ATP produced?
A
Step 7 - 2ATP and 10 - 2ATPFates
9
Q
What steps are coupled?
A
6 and 7
10
Q
What is glucose split into first?
A
Fructose-1,6- BP
11
Q
Fructose -6-phosphate to fructose-1,6-BP
A
Phosphofructokinase 1
12
Q
Substrate level phosphorylation
A
Requires soluble enzymes and chemical intermediates
13
Q
Respiration-linked
A
Membrane bound enzyme and gradients of protons
14
Q
Redox balance
A
NAD+ ESSENTIAL for glycolysis but limited in a cell so must be replenished to reduce intermediates
15
Q
Fates of pyruvate
A
- ethanol
- lactate
- acetyl coA
