Chemistry/Physics
Biology
Psychology
Classic MCAT facts!
100
Which compound has the highest melting point?
A. Glycerol
B. NaCl
C. Sucrose
D. H2O
B. NaCl
Because...
NaCl is held together by an ionic bond. All the other molecules are mainly held together by Hydrogen bonds. Ionic bonds are the strongest type of bond therefore will take the highest temperatures to break (melt)
100
Which could form the genome of a virus?
I. Single Strand RNA
II. Double strand DNA
III. Single strand DNA
A. I only
B. II only
C. I and II only
D. I, II, and III
D. I, II, and III
all types of nucleic acids can make up a viral genome!
single strand RNA: Poliovirus
double strand DNA: HPV, Herpes, Rotavirus
single strand DNA: Parvovirus (B19)
bonus!! partially double stranded DNA: Hep B!
100
Which is an example of a semantic memory?
A. How to drive a car
B. The parts of the car engine
C. The first time you ever learned how to drive
D. the love you had for your first car
B. the parts of the car enginge
Types of memories...
1. Semantic: recall of facts (explicit)
2. Episodic: events/experiences (explicit)
3. Procedural: skills/tasks (implicit)
-all types of LONG TERM MEMORY-
100
Name the amino acid
A. Alanine
B. Lysine
C. Leucine
D. Isoleucine
C. What is Leucine
200
A sound level is increased by 20 dB. By what factor does its intensity increase?
A. 2
B. 20
C. 100
D. log 2
C. 100
Because...
Bf=Bi + 10log (If/Ii)
Bf-Bi= 20 dB (change in sound level)
20= 10log (If/Ii)
20/10= log (If/Ii)
10^2= If/Ii
100=If/Ii
200
Which INCORRECTLY pairs a type of muscle fiber with its appropriate characteristic?
A. Red fibers- rich in mitochondria
B. Red fibers- high in myogblobin
C. White fibers- fast twitch
D. White fibers- only aerobic respiration
D. White fibers- only aerobic respiration
Because...
Red fibers: slow twitch with a lot of mitochondria and myoglobin (O2 storage) it uses for aerobic respiration USED MAINLY FOR SUSTAINED ACTIVITY
White fibers: fast twitch with few myoglobin and mitochondria, meaning they use mostly anaerobic respiration FATIGUE EASILY
200
Which is NOT a part of a person's "self concept"?
A. past self
B. ought self
C. future self
D. self-schemata
B. the ought self
The ought self is part of our self-esteem (actual, ideal, and ought self)
Self concept: made up of how we see ourselves, made up of...
1. past self: how we see what we were in the past
2. future self: how we view ourselves in the future
3. self-schemata: the "category" or "scheme" under which we see ourself (ex: athlete)
200
Area of the brain that controls the production of spoken language
A. Limbic System
B. Wernicke's Area
C. Broca's Area
D. Hippocampus
C. Broca's Area
300
If the speed of a wave is 3 m/s and its wavelength is 10 cm, what is its period?
A. 0.01 s
B. 0.03 s
C. 0.1 s
D. 0.3 s
B. 0.03s
v= frequency x wavelength
frequency and period are inverses of each other so.....
v= (1/period) x wavelength
3= (1/period) x 10
30= (1/period)
period= 1/30 or 0.03!
300
What layer does the notochord form from?
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Pseudo-mesoderm
B. Mesoderm
Ectoderm: forms the EXOSKELETON (skin, neural tube, but not notochord!)
Mesoderm: forms ORGANS (cardiac, skeletal muscle, red blood cells, etc.)
Endoderm: forms INNER LINING (GI tract, alveolar cells)
Pseudo-mesoderm does not exist (to my knowledge) I made it up
300
A 22 year old male is trying to find his identity in holding relationships with one another, which of Erikson's stage is he in?
A. Industry v. Inferiority
B. Autonomy v. Shame and Doubt
C. Identity v. Role Confusion
D. Intimacy v. Isolation
D. Intimacy v Isolation
MEMORIZE THESE!!
Trust v. Mistrust: 0-1 y/o
Autonomy v Shame: 1-3 y/o
Initiative v Guilt: 3-6
Industry v Inferiority: 6-12
Identity v Role confusion: 12-20
Intimacy v Isolation: 20-40
Generativity v Stagnation: 40-65
Integrity v Despair: 65+
300
Where the majority of self-reactive T cells are eliminated
A. Spleen
B. Lymph nodes
C. Bone Marrow
D. Thymus
D. Thymus
400
You have 58 g of salt (NaCl) that melts at 1060K and requires 30,000J of heat input, what is the change in entropy?
A. 28 J/K
B. 1, 580 J/K
C. 61,000 J/K
D. Need more information
A. 28 J/K
Use the entropy equation:
S=q/T
S= 30,000J/1060K
This is an example of when you can use the units!!! If you did not know the equation...all of the answers are in J/K and the question gives you two values in J and K! So just divide!
400
During development, which shunt carries blood from the pulmonary artery to the aorta, bypassing the developing lungs.
A. Ductus venosus
B. Ductus arteriosus
C. Foramen Ovale
D. the Umbilical vein
B. Ductus Arteriosus
Foramen Ovale: R atrium--> L atrium (bypass the lungs)
Ductus Arteriosus: pulmonary artery--> aorta (bypass the lungs)
Ductus Venosus: Umbilical cord--> IVC (bypass the liver)
400
What stage of demographic transition is characterized by both low birth and mortality rates?
A. 1
B. 2
C. 4
D. 3
C. 4
400
Which of these is equal to the SI unit that power is measured in
A. Js
B. J/s
C. Js/m
D. Js/m^2
B. J/s
Because Power= Work/time
Work is in J and time is in s
500
A defibrillator passes 15 A through a patient's body for 0.1 second. how much charge goes through the patient's skin?
A. .15 C
B. 1.5 C
C. 15 C
D. 150 C
B. 1.5 C
Current= Q/t (total charge over the time it flows)
15=Q/0.1 s
15 x 0.1= 1.5 C
500
Where are ribosomes primarily located in a neuron?
A. Axon
B. Axon Hillock
C. Soma
D. Dendrites
C. Soma
Parts of a neuron:
Dendrites: where signals are INPUT
Soma: aka the cell body, is where all of the "normal cell organelles" are located
Axon Hillock: where the action potential begins (top of the axon)
Axon: where the signal propagation takes place
500
Hypertension can be diagnosed by having two or more blood pressure readings higher than 140/90 on two different occasions, separated by a week. Suppose this criteria were changed to now include anyone with a reading higher than 130/80 on only one occasion. How would this change the PREVALENCE of the diagnosis of hypertension?
A. Increase
B. decrease
C. not change
D. Need more information
A. Increase
Prevalence: number of cases/population
Incidence: number of new cases/population at risk
500
Structure that responds to deep pressure and vibration
A. Meissner corpuscles
B. Ruffini corpuscles
C. Merkel cells
D. Pacinian corpuscles
D. Pacinian corpuscles
Pacinian corpuscles: deep pressure/vibration
Meissner corpuscles: light touch
Merkel cells: texture
Ruffini endings: stretch
Free nerve endings: pain, temperature