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AAMC FL#1 > AAMC FL#1 CHEM/PHYS > Flashcards

AAMC FL#1 CHEM/PHYS Flashcards

1
Q

in chromatography, the higher the absorption for the stationary phase, the _________ the molecule will move

A

slower

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2
Q

celluloase is a very ___

A

polar

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3
Q

what polarity is the stationary phase (reg)

A

polar - silica, or cellulose

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4
Q

in chroma what is principal factor determining the migration of individual components in sample

A

H bonds

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5
Q

what polarity will travel the furthest in chroma

A

non polar

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6
Q

what will affect the amount of each component in chroma that can be fully separated

A

thickness of paper

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7
Q

in chorm the staniary phase has no

A

concentration as its immobolized

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8
Q

what assumption, made if aspartic acid formed by prebiological synthesis - need to choose answer where somehitng comes before for ex.

A

compound A and cynaide was found on primitive earth

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9
Q

these alcohols readily dehydrate

A

tertiary - E1

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10
Q

during dehydration a ____ forms

A

carbocation

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11
Q

if there is formation of 2 products (cis/trans) then the reaction is NOT

A

stereospecific

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12
Q

what group is formed when aspartic acid reacts with another amino acid to form a peptide bond

A

amide group

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13
Q

the more substituded C-O bond is

A

weaker

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14
Q

at a secondayr carbon (2 pentaol) there is more ____ than 1 pentanol, causing for a ___ reaction substituion rate

A

sterin hindrance and slower

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15
Q

in gas chroma, molecules with low bp will elute

A

first has london dispersion forces

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16
Q

chlorine, bromins, alchols more _than alkenes

A

polar

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17
Q

deuterium is

A

hydrogen - more neutrons

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18
Q

to determine which reactant loses the OH group, want to ____ either of the oxygen

A

label - it specifically (OH group)

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19
Q

negative sign of lens strength is indicative of what lens

A

diverging

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20
Q

ES complex lowers the ____ and promotes is rapid progression by provinf certian or chem groups to form _____ bonds

A

AE, covalent

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21
Q

with enzymes stabalization of _______ changes the AE of the rx

A

transition state

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22
Q

acetic acid is (strong/weak)

A

weak

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23
Q

to dec the percentage ionization of acetic acid you need to

A

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,

24
Q

what is formula for the index of refraction

A

n = c/v - speed of light/speed on fluid

25
Q

the intensity of the radiatio emitted by the oxygen sensor is directly porportional to

A

the photons emitted

26
Q

if multiple photons emitted then it will

A

increase the intensity

27
Q

intensity of radiation is not related to/direct porportional to

A

speed, wavelength, and polarization

28
Q

THZ = HZ

A

1 THz = 1x10^12 Hz

29
Q

what is standard atomospheric pressure

A

760 mmHg

30
Q

whne half life questions and ask for how much DECAYS IT WILL BE

A

the most, 31/32 for ex, 1/32 is remaining (decay vs remaining)

31
Q

formula for work

A

= Power X time
= Fd
= -PV
= -U
=KE

32
Q

For work, when we calculate power vs time - use the whole time

A

10 min = 600s

33
Q

cysteine residues oxidize to form ___ and how do we break these bonds

A

disulfie bonds, reducing agent

34
Q

this bonding does not really enhance the rigidity of a micelle as much as intermolecular cross links

A

INTRA covalent bonding

35
Q

when residues wnat to particapte in adhesion we want to have

A

electrostatic interactions - have side chain - example are Arg an Asp

36
Q

side chain of Thr is a ____

A

secondary alcohol

37
Q

compared to ph of 4, a ph of 8 has a much higher net ____ charge

A

negative

38
Q

blood is ____

A

incompressible, such that the rate of flow into an area must equal the rate of flow out of an area

39
Q

velocity of blood flow in ___ porp to the total cross sectional area

A

inverse

40
Q

why is velocity of blood slower in capillaries than arteries

A

the total cross sectional area of capillaries exceeds that of arteries

41
Q

properties of ideal gas

A

have no attractive interactions; at high T and low P gases behave ideally; particles are far they dont exert any attractive forces

42
Q

STP means one mole of gas occupies a volume of 22.4L at

A

0 degrees

43
Q

what is the molar volume of ideal gas at 25

A

24.4L

44
Q

production of variety of opsin functions to

A

enable detection of different colours

45
Q

which enzyme does peptide bond cleavage

A

protease

46
Q

in glycogen , each glucose subunit is conected to adj subunit by what bond

A

1-4 glycosidic

47
Q

a phosphatase with _______ which means ____ phospatation, then the intensity on a western blot with ____

A

remove phosphate, meaning it will less, less

48
Q

Saying that we have sparse bracnhed means we have

A

decrease in branched enzyme - alpha 1,6

49
Q

which of equations will show least dissociation

A

one has HIGH negative charge

50
Q

gamma decay occurs when nucleus emits

A

photon

51
Q

what will happen if homogenous catalyst cannot be separated from products

A

products will be contaminated

52
Q

homo catalysts are those occupy the ____ phase as rx mixture

A

same

53
Q

if catalyst is finely ground before added to rx mix then, - adv of homo catalys

A

rate will be faster because a greater surface area of catalyst will be exposed

54
Q

if a new solid if formed when Al strip placed in zinc container then

A

al reduction potential is less than zinc

55
Q

common ion effect with ____ solubiity and and end up having more of the shared product, so equilibrium will shift

A

decrease, left

56
Q

units to express power

A

J/s, ftxlb/s, W

AAMC FL#1 (4 decks)

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