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MCAT Miscellaneous 2014 Flashcards

1
Q

What is the numerical value of the universal gravitational constant?

A

6.67 × 10-11 m3 kg-1 s-2

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2
Q

Give the numerical value for the Univ Gas Constant.

A

0.08206 L*atm*K-1*mol-1

or

8.314 J*K-1*mol-1

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3
Q

the formula for the Velocity of an object travelling in a circular path

A

V = [2*π*R] / T

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4
Q

Write the Arrhenius equation:

A

k = (A)*e -[Ea/RT]

or

ln k = ln A - (Ea / RT)

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5
Q

Adding a catalyst will [increase / decrease / not change] the rate constant k.

A

increase

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6
Q

Increasing the Temperature will** ** [increase / decrease / not change] the rate constant,k.

A

increase

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7
Q

Write out the Michaelis Menten equation?

A

Vo =

(Vmax * [S]) / ([S] + Km)

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8
Q

For an enzyme that displays Michaelis-Menten kinetics, what is the reaction velocity, V (expressed as a percentage of Vmax) when the substrate concentration is equal to 0.5 Km?

Answer is ______% of Vmax

A

Michaelis-Menten kinetics is:
v = (Vmax*[S]) / (Km+[S])

So if [S] = 0.5*Km ,
v=(Vmax*0.5Km)/(Km+0.5Km)
v=(0.5/1.5)*Vmax

Keep in mind, Vmax = 100 (obviously)

(0.5/1.5)*100 = 33.33%

so V is 33.33% of Vmax , when [S]=0.5*Km

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9
Q

Write the Henderson-Hasselbach equation:

A

pH = pK + log [Base / Acid]

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10
Q

Write out the NET reaction for Glycolysis:

A

Glucose + 2 ADP + 2 Pi + NAD+ →

2 **pyruvate **+ 2 **ATP **+ 2 **NADH **+ 2 **H+ ** + 2 H2O

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11
Q

What is the number (numerical value) for Planck’s constant?

A

6.63 x 10-34 J*s

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12
Q

What is a Southern blot?

A

lab technique that identifies DNA fragments

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13
Q

What is annealing?

A

binding of 2 complementary strands of nucleic acids into a double-strand

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14
Q

What is a Northern Blot?

A

a lab technique for identifying RNA fragments

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15
Q

What is a Western Blot?

A

a lab technique that uses electrophoresis, and uses antibodies to detect proteins

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16
Q

What does DNA ligase do?

A

joins DNA strands together by catalyzing the formation of a phosphodiester bond.

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17
Q

What does helicase do?

A

separates two annealed nucleic acid strands, by breaking the hydrogen bonds between annealed nucleotide bases

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18
Q

What does DNA gyrase do?

A

moves ahead of the helicase, nicking the strands, unwinding them a little bit, and resealing them.

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19
Q

What are protists?

A

a large and diverse group of eukaryotic microorganisms

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20
Q

Write the general equation for any Hydrocarbon combustion reaction:

A

CxHy + (x + y/4)*O2 → x*CO2 + (y/2)*H2O

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21
Q

Write the general equation for the combustion of a monosaccharide:

A

C<strong>x</strong>H<strong>2x</strong>O<strong>x</strong> + xO2 → xCO2 + xH2O

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22
Q

How do you calculate the surface area of a sphere?

A

Surface Area =

4π*r2

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23
Q

How do you calculate the volume of a sphere?

A

Sphere’s Volume =

4/3*π*r3

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24
Q

cos 30 = ?

(give the answer in both fraction and decimal forms)

A

0.87

or

√3/2 (radical 3, divided by 2)

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25
Q

convert 1/11 into a decimal:

A

≈ 0.091

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26
Q

mass of an electron, in kg:

A

9.109 x 10-31

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27
Q

1 m3 = _____ Liters

A

1 cubic meter = 1000 Liters

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28
Q

sin 45 = ??

(give the answer in both fraction and decimal forms)

A

= 1/√2 = √2/2

≈ 0.71

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29
Q

Convert 1/7 into decimal form:

30
Q

√2 = ??

Convert radical 2 into decimal form.

31
Q

tan 30 = ??

Convert tangent of 30 into both decimal and radical forms.

A

= √3/3

(radical 3, divided by 3)

≈ 0.577

32
Q

Convert 1/12 into decimal form:

33
Q

ln 2 = ??

34
Q

sin 60 = ??

(give the answer in both fraction and decimal forms)

A

≈ 0.87

= √3/2

(radical 3, divided by 2)

35
Q

cos 45 = ??

(give the answer in both fraction and decimal forms)

A

= √2/2

= 1/√2

≈ 0.71

36
Q

Convert 1/6 into a decimal:

A

≈ 0.1666…

37
Q

√3 ≈ ???

38
Q

tan 45 = ?

(give the answer in both fraction and decimal forms)

39
Q

tan 60 = ?

(give the answer in both fraction and decimal forms)

A

= √3

≈ 1.73

40
Q

Convert 1/5 into a decimal:

41
Q

Convert 1/8 into a decimal:

42
Q

1 L = ____ cc

A

1 Liter = 1,000 cubic centimeters

43
Q

the charge of an electron:

A

1.602 x 10-19 C

44
Q

cos 180 = ?

(give the answer in both fraction and decimal forms)

45
Q

Convert 1/9 into decimal form:

46
Q

cos 90 = ?

(give the answer in both fraction and decimal forms)

47
Q

cos 60 = ??

(give the answer in both fraction and decimal forms)

48
Q

Convert 3/11 into decimal form:

A

0.27272727…

49
Q

Convert 1/12 into decimal form:

50
Q

When talking about torque and momentum:

Stress = ___ * Modulus

A

Stress = Strain * Modulus

51
Q

When talking about torque and momentum:

???? = Strain * Modulus

A

Stress = Strain * Modulus

52
Q

When talking about torque and momentum:

Stress = Strain * ______

A

Stress = Strain * Modulus

53
Q

In momentum and torque problems, How do you calculate stress?

A

F/A

(Force divided by Area)

54
Q

How do you calculate strain?

A

Divide the Δ L by L

(Divide the net **Change **in object’s length, by it’s Original length.)

55
Q

1 Angstrom = _____ meters

A

10-10 meters

56
Q

The density of Water is ______ kilograms per cubic meter

A

1,000

kg/m3

57
Q

What is the trick to guesstimate the solubility of a compound, using that compound’s solubility product (Ksp)?

A

Solubility = if the compound dissociates into 2 particles, solubility is the SQUARE ROOT of the Ksp.

If compound dissociates into 3 particles, then the **solubility **≈ the CUBE root of the Ksp.

TRICK:
For 2-particle compounds: Divide the exponent on the Ksp by 2

For 3-particle compounds: Divide the exponent on the Ksp by 3.

58
Q

When you write the Ksp for a given dissolved substance, what part of the solution is not included in the Ksp“expression”? (i.e., expression → Ksp = []*[])

A

pure liquids,

and pure solids

59
Q

What is a “saturated solution”?

A

2 definitions:

  1. solution that is in equilibrium with its precipitate
  2. sol’n whose ion-product (i.e., []*[]) is equal to Ksp
60
Q

If “Metal A” and a different “Metal B” are given the same amount of heat, but Metal A’s Temperature rises more quickly:

Which metal has a higher specific heat?

61
Q

In the formula q = mcΔT,

“c” stands for: ???

A

the specific heat of a given substance

62
Q

What is the specific heat of H2O?

A

1 cal / g-1*ºC-1

or

1 cal / g-1*ºK-1

or

1 J / mol-1*ºK-1

63
Q

T/F:

The heat capacity of an object increases with its size.

64
Q

How do we calculate the magnification factor?

A

m = - (image / object)

65
Q

How do we know if an image will be upright or inverted?

A
  • If m is positive, image is upright.
  • If m is negative, image is inverted.
66
Q

In optics, How do we know the size of an image?

A

multiply height of object by mag factor

67
Q

What does it mean if object distance, o, is negative?

A

Not possible!

o is always positive

68
Q

What can cause the oxygen dissociation curve to shift to the right?

A
  • ↑↑ the partial pressure of CO2
  • ↓↓ the pH
  • ↑↑↑ the temperature
69
Q

How many radians in a given circle?

A

360 degrees = 2π radians

70
Q

1 radian = ____ degrees

71
Q

For conVEX (diverging) mirrors, explain/describe:

  • when the f, or i, or the image distance (o), or the height of image, is positive.
A
  • For conVEX Mirrors, both the focal length (f) and the image distance (i) are ALWAYS, ALWAYS, ALWAYS NEGATIVE. NO EXCEPTIONS.
  • An object is never imaginary!! So the object’s distance (o) will ALWAYS be POSITIVE.
  • Since conVEX mirrors show virtual (unreal) images, the images are always upright. Therefore, image’s height is ALWAYS positive. (upright image = positive height. inverted image = negative height)

SEE http://youtu.be/Pi02n_lteXA

72
Q

What is specific gravity?

A

density of something

÷

density of water

Catz (7 decks)

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