1What forces stabilize structures?
Covalent Bonds
Noncovalent bonds
2What consists of non covalent bonds?
Hydrogen bonds
Ionic interactions
Hydrophobic Interactions
Van der Waal interactions
3Why are weak interactions important?
cumulatively they are strong enough to stabilize structures, but individually they are weak enough to allow reversible and dynamic interactions.
4Lower pKa means
stronger acid
6Carbonic acid-bicarbonate buffer system
pH control of blood
7Carbonic Anhydrase
catalyzes the reversible reaction of carbon
8What is the pKa of the carbonic acid-bucarbonate buffer system?
6.4
9Dihydrogen phosphate-hydrogen phosphate system
controls intracellular pH
10What is the pKa of dihydrogen phosphate-hydrogen phosphate system?
7.0
11What aa helps with the dihydrogen phosphate-hydrogen phosphate system?
histidine
123 buffer systems
carbonic acid-bicarbonate buffer system
dihydrogen phophate-hydrogen phosphate system
proteins
13How are proteins part of the buffer system?
contain acidicasic groups and pKa values near 7.0
14What amino acid is important in the buffer system proteins? Why?
histidine because of the side chain imidazole
15H-bonds are strongest when the electronegative atoms and hydrogen are...
collinear
16Hydrophobic effect
hydrophobic molecules are forced together and are entropy-driven