exam 1 set
Card Set Information
exam 1 set
exam set 1
The titration curve for Asparate would show
3 titration curves
what is the pH of a solution that has a [H+]= 2.35X10^-3
2.6 (remember, H+ slightly up means pH slightly down)
Leucine zippers are very highly enriched in which of the following protein quarternary structures?
The amino acid cysteine plays an important role physiologically in protein structure because
it forms intra- or interchain disulfide bonds
which of the following is not a hydrophobic amino acid
The pKa of lactic acid is 3.8 and acetic acid is 4.8. Which is weaker?
acetic acid is a weaker acid. Bigger pKA= weaker acid
A buffer solution at pH 5.0 has a ratio of [HA]/[A-] of 2. What is the pKA of the acid.
5.3 use henderson hasselbalch
How does a buffer solution work?
Its used to neutralize the incoming H+ or OH- to maintain the pH of a solution.
Which group consists only of amino acids with polar side chains
cysteine, threonine, and histidine.
Which of the following molecules will not form hydrogen bonds?
anything with N O or F, probably something like CH4
What is the predominant form of the amino acid abbreviated D at pH 7?
The net charge on the amino acid R in a solution is closest to???
A reaction that produces a lot of H+ at pH 6.1 would need a buffer made from a 6.0 acid or a 7.3 acid?
What charged groups are present in serine at a pH of 11? The two pKa for serine is 2.21 and 9.15
The peptide bond...
Which of the following refers to the spatial arrangement of subunits and the nature of their interactions?
What is the common buffer system of the human body?
The free ketone of D-fructose can form a reversible intramolecular bond with the hydroxyl group attached at carbon 6 to form what is known as a...
a hemiketal furanose
be able to recognize sphingomyelin
alpha vs beta glucose? D vs L?
What does DPPC do?
Acts as a surfactant to decrease the surface tension of water in alveoli
highest vs lowest melting point of fatty acids?
higher= longer and less double bonds
lower= shorter and more double bonds.
The difference between starch and glycogen is/are
The degree of branched side chain is different between starch and glycogen
What are the main lipids of the membrane?
phospholipids, glycolipids, and cholesterol
Ramachandran angle chart
top left=beta sheet, top right= left handed alpha helix, bottom left= right handed alpha helix
whats the weight of a protein containing 200 amino acids?
22,000 daltons (200*110)
glycogen is an a-1,4 linked glucose with branch points liked by
-cocain addicts have LOW glucose usage
-radioactive taber usually has a short decay half life
-glucose can pass through the blood brain barrier
-a radioactive tracer is incorporated into biologically active molecules such a glucose and injected
In archaebacterial membrane, the fatty acids are linked to the glycerold backbone by what type of linkage
Which of the followings is the correct order for membrane permeability of different species
H2O> Indole> tryprophan> glucose> Na+
How chiral carbons are there for glucose
recognize and a (1-4) bond
water is very cohesive as each water molecule can form as many as
4 hydrogen bonds, 2 as a doner and 2 as an acceptor
in general which of the following bonds in the strongest
covalent bond is stronger than ionic
calculate the Tm of a primer
4(G+C) + 2(A+T)= melting temp in degrees C