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aamc exams > exam 2 c/p > Flashcards

exam 2 c/p Flashcards

1
Q

energy equation

A

E = hf

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2
Q

frequency equation

A

f = c/wavelength

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3
Q

equation for moving between two energy orbitals

A

E = -Rh ((1/nf^2) - (1/ni^2))

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4
Q

Compute the following ratio:

A

100 x 10^-6 / 2x10^-9

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5
Q

Kcat equation

A

kcat = Vmax / [ET]

kcat = turnover number
Vmax = maximum reaction rate
Et = given enzyme concentration

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6
Q

Silica gel

A

POLAR absorbant. Those with higher polarity will travel slower

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7
Q

half life of a radioactive material is

A

the time it takes for half of all the radioactive nuclei to decay into their daughter nuclei

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8
Q

torque

A

t = F * d * sin

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9
Q

tertiary structure

A

3D combo of a-helices and b-sheets that fold next to each other

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10
Q

What exhibits an electronic excited state that is closer in energy to the ground state?

A

an aromatic side chain as opposed to a peptide bond. Aromatic side chains have lower energy due to longer wavelengths.
Peptide bonds have higher energy due to shorter wavelengths.

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11
Q

which amino acids are charged with a + or a -?

A

-

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12
Q

Where do phosphoryl transfers by kinases come from on ATP?

A

Gamma32P - ATP

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13
Q

venturi effect

A

P air = P + ((ρv^2) / 2)

Oxygen pressure is the sum of the oxygen static pressure (P) and the oxygen flow pressure ρv^2 / 2.
Venturi effect is when static pressure of the air is larger than the static pressure of the oxygen in flow. (venturi mask)

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14
Q

What causes duplex DNA with a lower ratio of AT : GC to melt at a higher temperature?

A

increased pi- stacking strength.
GC base pairs form stronger pi-stacking interactions than AT, creating most thermal stability. Therefore, higher GC content increases melting temp.

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15
Q

Relative vapor pressure

A

Boiling point of a substance will give the best estimate of its relative vapor pressure.

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16
Q

Structural features possessed by storage lipids?

A

three fatty acids ester linked to a single glycerol
(triglycerols)

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17
Q

sphingosine

A

18-C amino alcohol with an unsaturated hydrocarbon chain. Primary part of sphingolipids, cell membrane lipid that includes sphinomyelin

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18
Q

Hydrogen oxidation

A

+1

19
Q

Oxygen oxidation

A

-2

20
Q

Red Cat, An Ox

A

Red Cat: reduced at the cathode
An Ox: Oxidized at the anode

21
Q

Boyle’s law

A

P1V1 = P2V2

22
Q

Charles’s law

A

V1/T1 = V2/T2

23
Q

Heisenbergs principle

A

We cannot know both the position and speed of a particle, such as a photon or electron with perfect accuracy

24
Q

Le chateliers principle

A

change in chemical equilibria

25
Q

Lewis base vs lewis acid

A

Lewis acid: electron acceptor
Lewis Base: Electron donor

26
Q

If something has a lone pair of electrons it may act as a

A

Lewis Base: electron donor

27
Q

Kf larger than 1

A

Kf larger than 1 will mean that delta G is negative, and the reaction is spontaneous.

If the Kf is smaller than 1, G will be positive and reaction will not be spontanetous

28
Q

Ionic bond

A

Bond between a metal and a nonmetal, preferential to bonds with higher differences of electronegativities.

29
Q

covalent bond

A

formed between two non metals

30
Q

coordinate covalent bond

A

also known as a dipolar bond, is a kind of two center, two electron covalent bond in which two electrons derive from the same atom.

AAMC def:
Lewis acid/base interaction between a metal cation and an electron pair donor is known as a coordinate covalent bond.

31
Q

How to determine smaller second ionization energy

A

Metals have lower ionization energies than nonmetals.
One valence electron: larger 2nd ionization energy
More than one: lower 2nd ionization energy

32
Q

Mass % equation

A

Mass % = mass of element / total mass x 100

33
Q

Henderson hasselbach equation

A

pH = pKa + log ([base] / [acid]).

34
Q

Ksp equation

A

Ksp = [A+]^a [B-]^b

A = Cation in solution
B = anion in solution
a,b = concentrations

35
Q

systolic

A

Blood flow starts at systolic, cannot be heard when the pressure of a cuff is greater than the systolic pressure.

36
Q

Hess’s law

A

H net = the sum of the change in enthalpy reactions

37
Q

What is stp?

A

1 MOL EQUIVALENT
ex: 4 moles of nitroglycerin produces 6 moles N2.
therefore, at stp, 1 mol nitroglycerin produces 1.5 mol N2

38
Q

Power equation

A

P = PE/t = mgh / t

39
Q

decimal log

A

think of it as the amount of zeros.
Ex: 20 = 100 (2 zeros)
30 = 1000 (three zeros)
etc

40
Q

diverging LENS

A

negative focal length. forms a virtual and reduced image

41
Q

order of energy conversions in a circuit

A

chemical to electrical to thermal

42
Q

protein secondary structure

A

backbone amide protons and carbonyl oxygen

43
Q

resistors in parallel

A

1/R = 1/R1 + 1/R2

44
Q
A

aamc exams (14 decks)

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