CHEM/PHYS Flashcards
if q says that one enzyme does a peptide bond hydrolysis where does next site attach
NH2 - amide bond - this was with aromatic residues
if fluroscent at 400nm and excitation at 360 nm, then what is energy?
answer would be h X c / excited - emitted
1 Nm equals = um
0.001 um
in reaction 1 the compound(substrate) mixed with O2 will undergo oxidation of hydroxul group attach phenol (turns to double bond) so what is pattern
hydroxy groups turn to carbonyl groups (double bond now)
for kcat what is formula and what is vmax aslo
vmax/E - vmax is also the rate
absorption of UV light by organic molecules always results in what process
excitation of bound electrons IT MAY RESULTS IT: bond breaking, ejection of electrons (10-124nm)
vibration of atoms in polar bonds happens by absorbing what
frequencies of infrared radiation (IR spectroscopy) not UV
what is more polar (OH, ketones, aldehydes) order (ACAK/AAEEA)
Amide > Carboxylic Acid > Alcohol > Ketone > Aldehyde > Amine > Ester > Ether > Alkane.
ketone or aldehyde which is more polar
ketone
the half life of radioactive material is
time it takes half of all the radioactive nuclei to decay into DAUGHTER NUCLEI (DOESNT NEED (MAY BE) TO BE RADIOACTIVE)
a person is sitting on chair, why must they need to lean forward or slide their feet
adjust to account for center of mass, keep body in equilibrium - NOT to inc force standing up (makes harder), also the energy required to stand is FIXED
tertiary structure is aka
full folded protein
when they say electronic excited state that is closer in energy to the ground state it means
lowest energy (large wavelenghth)
With ATP label each phosphate
a,b, y (last one) - gets cleaved alpha phosphate is the one attached to the ribose sugar
structure of ATP
phosphorylated Thr could be mimicked by what
glutamate - same negative charge
what phenomonen causes static air to be dran into the mask when oxygen flows
venturi effect
the venturi effect is the _____ in fluid pressure when a fluid passes through a ____ section
reduction, constricted
if we have more GC bonds why would we expect a higher melting point
increased pi stacking strength
which property of a substance is used to estimate its relative vapor pressure
boiling point
there is ___ relation bw vapor pressure and bp, so low bp then ___ vp
inverse, so high
molecules with identical molecular weight have ___ vapor pressures
different, its possible bs different arrangement/forces
molecules with lower dipole tend to have _____
higher vapor, but need to account for MW as well
name: 2 fatty acids ester linked to single glycerol and charged head group
phospholipid - membrane
name: 3 FA ester linked to a single glycerol
storage lipids - neutral - triacylglycerol
name: 2 FA ester linked in single sphingomine and charged head group
sphingomyelin inslutor in myelin sheath of axons
name: 3 FA ester linked to single spingosine
spingolipid - ceramide - involved with cell signaling
to determine if equation is spontaneous use this equation too
G=-RTlnK where k is formation constant/constant, and T is temperature
what best describes the bond between copper and nitrogen atoms
coordinate covalent – nitrigen donates electrons pair
if we have NH3 in reactants then add HCl what would it cause equilibrium
move left, because it will inc reaction rate, so faster to the right, then there will be a dec in reactants, so move left
this is the number to indicate the number of atoms, molecules or ions bonded to central atom
coordination number
ammonia is more __ and water is ___and ammonic can/not donate a electrons more readily
basic, and amphoteric, CAN
what is the ph of buffer solution that is 0.2M HCO3- and 2 M H2CO3 with the first pka of carbonic acid being 6.37
so firsy, we know we have more acid, so will be acidic, then see the differen in 10s between 0.2 and 2 M = 1 10, so minus 1 from pka
blood pressure - is
sys/dia 120/80
systole is when the heart
contracts - where the blood vessels will exceed the pressure in the cuff
in dna double helix the sugar phosphate backbones form the int/ext of the double helix
EXTERIOR
With the action of rubbing silk on the glass rod you are
removing electrons - not possible to add protons in this rubbing
the strength of the bond is ___ to bond energy
direct porp
if i have large bond energy the length will be
short
hess law for /_\H
H products – sum of H reactants
formula for Power can be
PE/time = mgh/time **can caclcualte the height with the number of steps and height of the steps
1 J equals
1 Nxm
formula for work done on elastic obj
1/2kx^2
negative focal length means (what lens)
diverging
once we have focal length and object distance plug in formula to solve for i which can be used in what equation
m=-i/o to tell magnificantion (reduced or bigger)
what are the energy conversion for battery powered resistive circuit
chemical - electric - thermal
protein secondary structure is characterized by pattern of H bonds bw
backbone amide protons and carbonyl oxygens
for acid base indicator you want to choose one thats
same near th eequivalence point - also indicators are weak
____ is the range over which the indicator will change colour
endpoint
for methyl orange what colour for acid/base
orange, yello
for bromo blue colour for acid/base
yellow, blue
for phenolpthalein what colours
colourless, pink
for NMR, what do the signals mean
it related to the number of hydrogens, symettry (refers to the # of groups of distinct hydrogens)
for NMR with cyclic what lines of symmetry
hori and vert
for NMR if theres no line of symmetry then all Hs are
unique
for NMR with splits what does it mean and the formula
its refers to the number of spike - n+1 where n is the number of adjacent HYDROGENS
For NMR, integration refers to
how tall the spike is - refers to how many of the uniqure hydrogen there are (5 vs 4 vs 3 H’s in each group)
for NMR shifts refer to
how far it is way from 0 (TMS)
in NMR shift are based on what
EN atoms, and unsaturated groups
in NMR if hydrogens are close to the Cl then they are
downfield (left) (greater EN)
in NMR downfield where we find
EN atoms or unsat (deshielding)
say the order of the NMR from down to up
carboxy, aldehyde, aromatic, OH, halides, alkenes, alkanes
