AAMC Sample Test

Question 1

Antagonist

Answer 1

Acts as an inhibitor

Question 2

Relationship between Ksp and concentrations of solutes when it forms a precipitate

Answer 2

Ksp is lower than the solutes

[Ca2+][C2O4 2-] < Ksp

Question 3

Which way do electric field lines travel?

What charge does the axon have? (Intracellularly)

Answer 3

Positive Towards negative

Axon is negatively charged. Extracellular solution has 0 net potential

Question 4

Resistance vs Resistivity

Answer 4

Resistance depends on object size and geometry (shape)

Resistivity depends on object material ONLY

Question 5

A compound only partially ionized to form hydrogen ions. What kind of acid/base is it?

Answer 5

Weak acid

Question 6

How does a basic anion behave in water vs in acidic solution?

Answer 6

water - insoluble

acidic solution - dissolves; hydroxide ion will react with protons in solution

Question 7

squalene is a precursor to

Answer 7

all steroid hormones

Question 8

Why do hemiketals not be oxidized by a Ag2O compound?

Answer 8

Hemiketals can’t undergo mutarotation because they are NOT capable of ring-opening. So will not be oxidized by Ag+. Thus they are also NOT reducing sugars

Question 9

Ultrasound requires

Answer 9

the speed of the sound, and the frequencies of the sound waves emitted and observed.
Doppler effect relates frequency of ultrasound waves as detected by a moving detector to the frequency of the wave when the source is stationary, the speed of the source and the speed of the detector

Question 10

principal quantum number is measure of

Answer 10

the approximate radial size of an electron cloud

Question 11

fatty acids consist of

Answer 11

hydrocarbon tail and a carboxylic acid - like seen in palmitoleic acid

Question 12

if enzyme has anionic side chain then it will attract

Answer 12

positively charged chains

Question 13

Resistivity and temperature have what kind of relationship

Answer 13

resistivity and temperature have a linear relationship

Question 14

IR spectrum reads _______ a region 1580-1610 cm-1
, 1700-1750 cm-1,
, and 3200- 3500 cm-1

Answer 14

1700-1750 cm-1 : C=O stretching frequency

3200-3500cm-1 : O-H stretching frequency

Question 15

In a reaction, neither reactant is chiral, but a chiral product forms because the _________ is chiral

Answer 15

enzyme is chiral so reaction is stereospecific

Question 16

What procedure is used to remove water from frozen sasmple of polypeptides and proteins in aqueous extracts?

Answer 16

sublimation (directly from solid to gas) of the water under reduced pressure will keep mixture cold and maintain protein in its native state

Question 17

Archimedes’ principle

Answer 17

Wair/ (Wair - Wwater)

Ratio of object density to density of fluid it’s submersed in is equal to ratio of object weight in air to the difference of submersed weight and weight in air

Question 18

What affects charge on polypeptides ***not sure of answer

Answer 18

In polypeptides, only the side chains will determine charge at different pHs — look up examples

Question 19

Ionic interactions of ADP will be stabilized by….

Answer 19

ADP have negative ions so it will be stabilized by positive charges compounds/AAs like Histidine and Arginine

Question 20

what reaction is lactate dehydrogenase responsible for and what happens to NADH/NAD+

Answer 20

It oxidizes NADH to NAD+ and converts pyruvate to lactate

Question 21

How do you find frequency of a photon?

Answer 21

E = hf
E = energy of photon given by charge 
h = Planck's constant = 6.62*10^-34 J*s
f = frequency of the photon

Question 22

Advantage of Doppler ultrasound over standard ultrasound?

Answer 22

Dopper ultrasound uses doppler effect where a sound wave emitted or reflected from a MOVING object CHANGES its frequency based on the relative speed of the object — helps to determine flow of blood in a vessel

Question 23

How to get work value when given watts.

Answer 23

Watts is the unit for Power

Power = Work/time

Question 24

What pKa of buffer should you choose for an experiment at pH of 5.3?

Answer 24

Choose a good buffer with pKa WITHIN 1 pH unit of 5.3 !!!

Question 25

Why balanced reaction of pyruvate to lactate reduction doesnt have electrons?

Answer 25

Because the half reactions of pyruvate to lactacte and NADH to NAD have electrons that will cancel out when added. The hydrogens are added to half reactions to balance out the electrons

Question 26

Proactive interference

Answer 26

interference of information from long term memory which impedes learning of new information

Question 27

Confirmation Bias

Answer 27

tendency to favor information that confirms existing beliefs; involves biases in search for evidence and in interpretation of evidence; usually stronger for emotionally charged topics

Question 28

Organization is...?

Answer 28

a group with identifiable membership that engages in concerted action to achieve a common purpose

Question 29

Anomie is....?

Answer 29

lack of social norms, which leads to breakdown in connection between individual and community

Question 30

``` Intelligence theories by: Gardner Spearman Galton Binet ```

Answer 30

Gardner's idea of 8 intelligences: says people have different TYPES of intelligences Spearman's idea of general intelligence: WILL NOT predict some aspects of intelligence are impaired by disorder while others remain intact Galton's idea of hereditary genius - based on intellience history of participants' families Binet's idea of mental age-