Biochemistry Flashcards
What is Hydrophilic
Water loving, prefers water
What is Hydrophobic
Hates water, often faced away from water
What is Amiphillic/Amphipathic
Both polar and non polar ;
creates micelles and bilayer; i.e fatty acids and phospholipids
What is Amphiprotic
Can donate or accept an H+ proton
What is Amphoteric
Can act as an acid or a base, i.e a.a or water
What are buffers?
Can help our bodies resist changes in pH
i.e carbonic acid bicarbonate buffer system
an animal cell is placed in a hypertonic solution, this results in the diffusion of
water out of the cell
what isn’t a function in the plasma membrane
non polar molecules through the membrane
what kind of molecules can move across the phospholipid bilayer easiest
small hydrophilic molecules
2 glucose molecules make
Maltose α-(1,4’) glycosidic bond
which isn’t involved in the manufacture, transportation or processing of proteins throughout the cell
mitochondria
hydrolysis of ATP produced -7.3kcal/mol. which rxn can it be couples with?
A. A–>B delta G = +6.0kcal/mol
B. A–>B delta G = -8.0kcal/mol
C. A–>B delta G = -6.0kcal/mol
D. A–>B delta G = +8.0kcal/mol
D. A–>B delta G = +8.0kcal/mol
delta G = 1.3kcal/mol
which free energy decreases in a chemical rxn it is said to be?
exergonic
Allosteric enzymes can or cannot have quaternary structure?
they HAVE to have it
which is an increase in entropy?
A. a room becoming more tidy
B. perfume diffusing in a room
C. a liquid freezing into a crystal
D. watching a paper being ripped in reverse
b
site of ribosome biogensis
nucleolus
produces energy for the cell through cellular respiration
mitochondria
metabolic pathways build large molecules
anabolic, building of bonds
endergonic
“absorbing energy in the form of work.” The activation energy for the reaction is typically larger than the overall energy of the exergonic reaction
how do cholesterols help with fluidity in the cell membrane
Cholesterol is also a key determinant of membrane fluidity: at high temperatures, cholesterol acts to stabilize the cell membrane and increase its melting point;
while at low temperatures, it inserts into phospholipids and prevents them from interfering with each other to avoid aggregation
