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AAMC FL #2 > CHEM/PHYS > Flashcards

CHEM/PHYS Flashcards

1
Q

if q says that one enzyme does a peptide bond hydrolysis where does next site attach

A

NH2 - amide bond - this was with aromatic residues

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2
Q

if fluroscent at 400nm and excitation at 360 nm, then what is energy?

A

answer would be h X c / excited - emitted

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3
Q

1 Nm equals = um

A

0.001 um

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4
Q

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

A

hydroxy groups turn to carbonyl groups (double bond now)

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5
Q

for kcat what is formula and what is vmax aslo

A

vmax/E - vmax is also the rate

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6
Q

absorption of UV light by organic molecules always results in what process

A

excitation of bound electrons IT MAY RESULTS IT: bond breaking, ejection of electrons (10-124nm)

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7
Q

vibration of atoms in polar bonds happens by absorbing what

A

frequencies of infrared radiation (IR spectroscopy) not UV

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8
Q

what is more polar (OH, ketones, aldehydes) order (ACAK/AAEEA)

A

Amide > Carboxylic Acid > Alcohol > Ketone > Aldehyde > Amine > Ester > Ether > Alkane.

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9
Q

ketone or aldehyde which is more polar

A

ketone

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10
Q

the half life of radioactive material is

A

time it takes half of all the radioactive nuclei to decay into DAUGHTER NUCLEI (DOESNT NEED (MAY BE) TO BE RADIOACTIVE)

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11
Q

a person is sitting on chair, why must they need to lean forward or slide their feet

A

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

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12
Q

tertiary structure is aka

A

full folded protein

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13
Q

when they say electronic excited state that is closer in energy to the ground state it means

A

lowest energy (large wavelenghth)

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14
Q

With ATP label each phosphate

A

a,b, y (last one) - gets cleaved alpha phosphate is the one attached to the ribose sugar

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15
Q

structure of ATP

A
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16
Q

phosphorylated Thr could be mimicked by what

A

glutamate - same negative charge

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17
Q

what phenomonen causes static air to be dran into the mask when oxygen flows

A

venturi effect

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18
Q

the venturi effect is the _____ in fluid pressure when a fluid passes through a ____ section

A

reduction, constricted

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19
Q

if we have more GC bonds why would we expect a higher melting point

A

increased pi stacking strength

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20
Q

which property of a substance is used to estimate its relative vapor pressure

A

boiling point

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21
Q

there is ___ relation bw vapor pressure and bp, so low bp then ___ vp

A

inverse, so high

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22
Q

molecules with identical molecular weight have ___ vapor pressures

A

different, its possible bs different arrangement/forces

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23
Q

molecules with lower dipole tend to have _____

A

higher vapor, but need to account for MW as well

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24
Q

name: 2 fatty acids ester linked to single glycerol and charged head group

A

phospholipid - membrane

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25
Q

name: 3 FA ester linked to a single glycerol

A

storage lipids - neutral - triacylglycerol

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26
Q

name: 2 FA ester linked in single sphingomine and charged head group

A

sphingomyelin inslutor in myelin sheath of axons

27
Q

name: 3 FA ester linked to single spingosine

A

spingolipid - ceramide - involved with cell signaling

28
Q

to determine if equation is spontaneous use this equation too

A

G=-RTlnK where k is formation constant/constant, and T is temperature

29
Q

what best describes the bond between copper and nitrogen atoms

A

coordinate covalent – nitrigen donates electrons pair

30
Q

if we have NH3 in reactants then add HCl what would it cause equilibrium

A

move left, because it will inc reaction rate, so faster to the right, then there will be a dec in reactants, so move left

31
Q

this is the number to indicate the number of atoms, molecules or ions bonded to central atom

A

coordination number

32
Q

ammonia is more __ and water is ___and ammonic can/not donate a electrons more readily

A

basic, and amphoteric, CAN

33
Q

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

A

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

34
Q

blood pressure - is

A

sys/dia 120/80

35
Q

systole is when the heart

A

contracts - where the blood vessels will exceed the pressure in the cuff

36
Q

in dna double helix the sugar phosphate backbones form the int/ext of the double helix

A

EXTERIOR

37
Q

With the action of rubbing silk on the glass rod you are

A

removing electrons - not possible to add protons in this rubbing

38
Q

the strength of the bond is ___ to bond energy

A

direct porp

39
Q

if i have large bond energy the length will be

A

short

40
Q

hess law for /_\H

A

H products – sum of H reactants

41
Q

formula for Power can be

A

PE/time = mgh/time **can caclcualte the height with the number of steps and height of the steps

42
Q

1 J equals

A

1 Nxm

43
Q

formula for work done on elastic obj

A

1/2kx^2

44
Q

negative focal length means (what lens)

A

diverging

45
Q

once we have focal length and object distance plug in formula to solve for i which can be used in what equation

A

m=-i/o to tell magnificantion (reduced or bigger)

46
Q

what are the energy conversion for battery powered resistive circuit

A

chemical - electric - thermal

47
Q

protein secondary structure is characterized by pattern of H bonds bw

A

backbone amide protons and carbonyl oxygens

48
Q

for acid base indicator you want to choose one thats

A

same near th eequivalence point - also indicators are weak

49
Q

____ is the range over which the indicator will change colour

A

endpoint

50
Q

for methyl orange what colour for acid/base

A

orange, yello

51
Q

for bromo blue colour for acid/base

A

yellow, blue

52
Q

for phenolpthalein what colours

A

colourless, pink

53
Q

for NMR, what do the signals mean

A

it related to the number of hydrogens, symettry (refers to the # of groups of distinct hydrogens)

54
Q

for NMR with cyclic what lines of symmetry

A

hori and vert

55
Q

for NMR if theres no line of symmetry then all Hs are

A

unique

56
Q

for NMR with splits what does it mean and the formula

A

its refers to the number of spike - n+1 where n is the number of adjacent HYDROGENS

57
Q

For NMR, integration refers to

A

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)

58
Q

for NMR shifts refer to

A

how far it is way from 0 (TMS)

59
Q

in NMR shift are based on what

A

EN atoms, and unsaturated groups

60
Q

in NMR if hydrogens are close to the Cl then they are

A

downfield (left) (greater EN)

61
Q

in NMR downfield where we find

A

EN atoms or unsat (deshielding)

62
Q

say the order of the NMR from down to up

A

carboxy, aldehyde, aromatic, OH, halides, alkenes, alkanes

63
Q
A

AAMC FL #2 (3 decks)

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