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AAMC Qpacks > MCAT official prep online practice questions > Flashcards

MCAT official prep online practice questions Flashcards

1
Q

In a fischer projection when the priority of the groups is counterclockwise it is a ___ formation

A

Counterclockwise is S

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2
Q

In a fischer projection when the priority of the groups is clockwise it is a ___ formation

A

Clockwise is R

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3
Q

What is the configuration of naturally occurring aspartic acid?

A

Naturally occurring aspartic acid has an L configuration

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4
Q

What letters apply to the configurations of double bonds?

A

Z and E

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5
Q

What is the side chain of valine?

A
  • CH(CH3)2
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6
Q

What is the three letter symbol of aspartic acid?

A

Asp

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7
Q

What is the three letter symbol of valine?

A

Val

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8
Q

What is the side chain of phenylalanine?

A

-C6H5

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9
Q

What is the three letter symbol of phenylalanine?

A

Phe

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10
Q

What is the three letter symbol of Lysine?

A

Lys

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11
Q

What is the side chain of lysine?

A

-(CH2)4NH2

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12
Q

If Keq is equal to 1 what is delta G equal to?

A

If Keq is equal to 1 then delta G is equal to 0 (so no ATP is required or produced during the reaction)

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13
Q

Oxaloacetate is an example of what kind of molecule?

A

Alpha-keto acid

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14
Q

What is the wavelength range for visible light?

A

400-750 nm

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15
Q

The wavelength of 226 nm corresponds with what wave on the electromagnetic spectrum?

A

Ultraviolet waves

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16
Q

The wavelength of 1.26 μm corresponds with what wave on the electromagnetic spectrum?

A

Infrared radiation

17
Q

The wavelength of 3.17 μm corresponds with what wave on the electromagnetic spectrum?

A

Infrared radiation

18
Q

Formula for work by an elastic force

A

W = Fx/2 work = (force x distance) / 2

19
Q

Pico is 10?

A

Pico is 10-12

20
Q

Nano is 10?

A

Nano is 10-9

21
Q

Micro is 10?

A

Micro is 10-6

22
Q

Power related to speed and force?

A

Power = force x velocity

P = F x v

23
Q

Membrane symport is ______

A

Lipophilic - because membranes have polar and nonpolar components

24
Q

Which is smaller Na+ or K+?

A

Na+ is smaller than K+

25
Q

If a catalyst is saturated with a substrate, how will increasing the concentration of the substrate affect the rate of the reaction?

A

Increasing the substrate when the catalyst is already saturated will have no effect on the rate of the reaction

26
Q

Do hydrophilic or hydrophobic molecules cross the cell membrane?

A

The hydrophobic core of the membrane prevents the diffusion of hydrophilic molecules (such as ions and polar molecules) across the membrane. Hydrophobic molecules can easily cross the membrane

27
Q

What happens to the pH as a result of the removal of a weak base?

A

There is a decrease in pH due to a decrease in the amount of OH- in solution

28
Q

What is beta decay?

A

Beta decay is the decay in which a beta particle (an electron or positron) is emitted from a heavy atom nucleus

29
Q

What happens during alpha decay?

A

During alpha decay, alpha particles (helium nuclei) are emitted from an atom

30
Q

What happens during gamma absorption?

A

During gamma absorption, the absorption of gamma rays consists of the process in which high energy photons are absorbed by target atoms

31
Q

The speed of transverse waves is directly proportional to?

A

The propogation speed of transverse waves is directly proportional to the tension applied along the cord

32
Q

What is the formula for the fundamental frequency of a vibrating string?

A

f = v / 2L

Frequency = velocity / 2x length

33
Q

What is the idea of saturation kinetics?

A

For an enzymatically catalized process, the reaction rate will level off with the increasing concentration of the substrate - this is because the enzyme becomes a bottleneck for the reaction.

34
Q

Does the dissociation of the myosin head from the actin filament require ATP?

A

Yes: Dissociation of the myosin head from the actin filament requires the binding of ATP

35
Q

Does the attachment of the myosin head to the actin filament require ATP?

A

NO: The attachment of the myosin head to the actin filament requires calcium and a triponin/tropomyosin shift

36
Q

Does the conformational change that moves actin and myosin filaments relative to one another require ATP?

A

Yes: The conformational changes that move actin and myosin relative to one another require that ATP be hydrolyzed - The conformational change occurs when the products of hydrolysis (ADP and Pi) are released

37
Q
A

AAMC Qpacks (7 decks)

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