Fucking bitch ass final Flashcards
Universal currency of free energy in biological systems
ATP
ATP hydrolysis is (EXERGONIC/ENDERGONIC)
EXERGONIC
How does ATP drive metabolism?
By shifting the equilibrium of coupled reactions
The high phosphoryl potential of ATP results from what?
Structural differences between ATP and its hydrolysis products
Phosphoryl-transfer potential is an important form of:
Cellular energy transformation
Delta G when Keq is:
> 1.0:
1.0:
<1.0:
State the direction of the reaction
Negative - reaction proceeds forward (to the right)
Zero- reaction is at equilibrium
Positive- Reaction proceeds in reverse (to the left)
Ranking of standard free energies… I think this chart on slide 3 shows what compounds are more reactive?
Phosphoenolpyruvate
1,3-Bisphosphoglycerate
Creatine phosphate
ATP (to ADP)
Glucose 1-phosphate
Pyrophosphate
Glucose 6-phosphate
Glycerol 3-phosphate
What does chemical coupling of exergonic and endergonic reactions allow?
Allows otherwise unfavorable reactions to be favorable
ATP reacts directly with what in coupled reactions?
The metabolite that needs “activation”
Separation of 4 negative charges on ATP in hydrolysis
Electrostatic repulsion
What has greater resonance stabilization that ATP?
ADP and Pi
Steps of ATP — ADP
1- Hydrolysis with relief of charge repulsion
2- Resonance stabilization
3- Ionization
More water can bind to ____ and ____ than to ATP.
What does the water cause?
ADP and Pi
Stabilizing the ADP and Pi by hydration
Substrate level phosphorylation fuel _____ and ________
Ex-
1,3-Bisphosphoglycerate + ADP ——> ?
Oxidation and ATP synthesis
3-phosphoglyceric acid
Oxidative phosphorylation proton gradients and ATP syntheses steps
1- Gradient created oxidation of fuels pumps protons out (Carbon fuels + O2 —> CO2 + H2O)
2- Gradient used influx of protons forms ATP (ADP + Pi —-> ATP + H2O)