AAMC FL#1 CHEM/PHYS Flashcards
in chromatography, the higher the absorption for the stationary phase, the _________ the molecule will move
slower
celluloase is a very ___
polar
what polarity is the stationary phase (reg)
polar - silica, or cellulose
in chroma what is principal factor determining the migration of individual components in sample
H bonds
what polarity will travel the furthest in chroma
non polar
what will affect the amount of each component in chroma that can be fully separated
thickness of paper
in chorm the staniary phase has no
concentration as its immobolized
what assumption, made if aspartic acid formed by prebiological synthesis - need to choose answer where somehitng comes before for ex.
compound A and cynaide was found on primitive earth
these alcohols readily dehydrate
tertiary - E1
during dehydration a ____ forms
carbocation
if there is formation of 2 products (cis/trans) then the reaction is NOT
stereospecific
what group is formed when aspartic acid reacts with another amino acid to form a peptide bond
amide group
the more substituded C-O bond is
weaker
at a secondayr carbon (2 pentaol) there is more ____ than 1 pentanol, causing for a ___ reaction substituion rate
sterin hindrance and slower
in gas chroma, molecules with low bp will elute
first has london dispersion forces
chlorine, bromins, alchols more _than alkenes
polar
deuterium is
hydrogen - more neutrons
to determine which reactant loses the OH group, want to ____ either of the oxygen
label - it specifically (OH group)
negative sign of lens strength is indicative of what lens
diverging
ES complex lowers the ____ and promotes is rapid progression by provinf certian or chem groups to form _____ bonds
AE, covalent
with enzymes stabalization of _______ changes the AE of the rx
transition state
acetic acid is (strong/weak)
weak
to dec the percentage ionization of acetic acid you need to
add more acid - strong acid, so equilibrium will shift left, if we dilute or add base, or chlorinate (neg sign) then it will actually increase % ion,
what is formula for the index of refraction
n = c/v - speed of light/speed on fluid
the intensity of the radiatio emitted by the oxygen sensor is directly porportional to
the photons emitted
if multiple photons emitted then it will
increase the intensity
intensity of radiation is not related to/direct porportional to
speed, wavelength, and polarization
THZ = HZ
1 THz = 1x10^12 Hz
what is standard atomospheric pressure
760 mmHg
whne half life questions and ask for how much DECAYS IT WILL BE
the most, 31/32 for ex, 1/32 is remaining (decay vs remaining)
formula for work
= Power X time
= Fd
= -PV
= -U
=KE
For work, when we calculate power vs time - use the whole time
10 min = 600s
cysteine residues oxidize to form ___ and how do we break these bonds
disulfie bonds, reducing agent
this bonding does not really enhance the rigidity of a micelle as much as intermolecular cross links
INTRA covalent bonding
when residues wnat to particapte in adhesion we want to have
electrostatic interactions - have side chain - example are Arg an Asp
side chain of Thr is a ____
secondary alcohol
compared to ph of 4, a ph of 8 has a much higher net ____ charge
negative
blood is ____
incompressible, such that the rate of flow into an area must equal the rate of flow out of an area
velocity of blood flow in ___ porp to the total cross sectional area
inverse
why is velocity of blood slower in capillaries than arteries
the total cross sectional area of capillaries exceeds that of arteries
properties of ideal gas
have no attractive interactions; at high T and low P gases behave ideally; particles are far they dont exert any attractive forces
STP means one mole of gas occupies a volume of 22.4L at
0 degrees
what is the molar volume of ideal gas at 25
24.4L
production of variety of opsin functions to
enable detection of different colours
which enzyme does peptide bond cleavage
protease
in glycogen , each glucose subunit is conected to adj subunit by what bond
1-4 glycosidic
a phosphatase with _______ which means ____ phospatation, then the intensity on a western blot with ____
remove phosphate, meaning it will less, less
Saying that we have sparse bracnhed means we have
decrease in branched enzyme - alpha 1,6
which of equations will show least dissociation
one has HIGH negative charge
gamma decay occurs when nucleus emits
photon
what will happen if homogenous catalyst cannot be separated from products
products will be contaminated
homo catalysts are those occupy the ____ phase as rx mixture
same
if catalyst is finely ground before added to rx mix then, - adv of homo catalys
rate will be faster because a greater surface area of catalyst will be exposed
if a new solid if formed when Al strip placed in zinc container then
al reduction potential is less than zinc
common ion effect with ____ solubiity and and end up having more of the shared product, so equilibrium will shift
decrease, left
units to express power
J/s, ftxlb/s, W
