Bioenergetics Flashcards
An increase in - delta g of the hydrolysis of ATP is due to 3 main causes. Name them:
1) resonance of inorganic phosphate
2) less bond strain in ADP
3) increased degree of solvation in products
Enzymes speed up reactions by lowering ______ but they have no effect on the ____ (position of equilibrium).
- Delta G **crosshairs
- Delta G rxn
Name 3 ways to regulate metabolic pathways:
1) Change the amount of enzyme present
2) Modify the catalytic activity of enzymes
3) Movement of substrates between compartments
What is the vitamin precursor for NADH and NADPH ?
Niacin (Vit. B3)
What is the vitamin precursor for FADH2 and FMNH2?
Riboflavin (Vit. B2)
What is the precursor for Coenzyme A?
Pantothenate
What are the consequences of Vitamin B2 deficiency?
Cheliosis, angular stomatits, and dermatitis
What type of reactions does vitamin B2 usually take part in?
Redox reactions
What vitamin is usually involved in redox reactions and deficiencies may lead to Pellegra?
Niacin
For delta G to be negative, delta H must be ___ or T-delta-S must be ____ (or both)
(-)
+
When products have less energy than reactants, delta H is ___ and excess energy is liberated as heat.
(-)
When delta G is ___ the reactions spontaneous, exergonic, and proceeds to the right.
(-)
Equilibrium is reached when delta G = ___
zero
Change in free energy is related to the ___ of a reaction but not its ____ or ____.
- directionality
- rate
- the path it follows
When the delta G of a cell is negative, delta G prime between -3 and +3 can be spontaneous and is driven by ______.
Mass Action Effects
