MCAT MCAT Questions

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[mcat prep]

Here's our first MCQ! Can you answer this Physics MCAT practice question?

A 75 N force is used to push a large container weighing 400 N. The container does not move. What is the frictional force exerted by the floor on the container?

A. Less than 75 N
B. Exactly 75 N
C. Between 75 N and 400 N
D. Exactly 400 N

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[mcat prep]

Here's our first MCQ! Can you answer this Physics MCAT practice question?

A 75 N force is used to push a large container weighing 400 N. The container does not move. What is the frictional force exerted by the floor on the container?

A. Less than 75 N
B. Exactly 75 N
C. Between 75 N and 400 N
D. Exactly 400 N

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Answer: B
If the container is not moving, then the net force must be zero (a net force would result in acceleration; PHY 2.1). If a push of 75 N results in no movement then there must be a static frictional force equal and opposite to the push.

 

[mcat prep]

Can you answer this Biochemistry MCAT practice question?

Glycogen is most commonly found in which of the following cell types?

A. Brain cells and red blood cells
B. Bone marrow cells and brain cells
C. Muscle cells and liver cells
D. Red blood cells and white blood cells

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[mcat prep]

Can you answer this Biochemistry MCAT practice question?

Glycogen is most commonly found in which of the following cell types?

A. Brain cells and red blood cells
B. Bone marrow cells and brain cells
C. Muscle cells and liver cells
D. Red blood cells and white blood cells

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Answer: C Glycogen is most commonly found in muscle cells, which often require immediate and abundant stores of glucose for glycolysis, and liver cells, which regulate the levels of blood glucose in the body.

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[mcat prep]

Can you answer this Sociology MCAT practice question?

A teenage student who wants to excel at school but also hang out with her friends might experience:
A. role exit.
B. role engulfment.
C. role strain.
D. role conflict.

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[mcat prep]

Correct Answer: D The example describes role conflict. There are two statuses, teenager and student, which come with different, conflicting role demands, namely hanging out with friends and excelling at school.

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Can you answer this Sociology MCAT practice question?

A teenage student who wants to excel at school but also hang out with her friends might experience:
A. role exit.
B. role engulfment.
C. role strain.
D. role conflict.

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[mcat prep]

Can you answer this Biology MCAT question?

Which of the following would be the best evidence that two species are related?

A. Analogous structures
B. Homologous structures
C. Similar use of the environment
D. Similar outward appearance

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[mcat prep]

Can you answer this Biology MCAT question?

Which of the following would be the best evidence that two species are related?

A. Analogous structures
B. Homologous structures
C. Similar use of the environment
D. Similar outward appearance

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Correct answer: B

Homologous structures originate from the same part of the embryo in different species allowing a comparison of evolutionary history.

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[mcat prep]

Can you answer this General Chemistry MCAT question?

Which of the following terms is not an intermolecular attractive force?

A. H-bonding
B. Dispersion forces
C. Dipole-dipole interactions
D. Resonance structures

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[mcat prep]

Can you answer this General Chemistry MCAT question?

Which of the following terms is not an intermolecular attractive force?

A. H-bonding
B. Dispersion forces
C. Dipole-dipole interactions
D. Resonance structures

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Answer: D Resonance is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be shown by only a single Lewis structure (CHM 3.2; ORG 1.4). A molecule or ion with delocalized electrons is represented by several contributing structures (= resonance structures or canonical forms). This relates to the internal arrangement of the molecule but NOT to intermolecular attractive forces.

 

[mcat prep]

Can you answer this Organic Chemistry MCAT question?

An ”isolated diene” is defined as a hydrocarbon with two double bonds separated by more than one single bond. A ”conjugated diene” however has its two double bonds separated by one single bond. As such, why is a conjugated diene considered more stable than an isolated diene?

A. Due to decreased stability as a result ofelectron delocalization
B. Due to sigma electron pair conjugation
C. Due to electron delocalization and orbital hybridization of the C-C single bonds
D. Due to the geometry of the cumulated dorbitals of the existing double bonds

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[mcat prep]

Can you answer this Organic Chemistry MCAT question?

An ”isolated diene” is defined as a hydrocarbon with two double bonds separated by more than one single bond. A ”conjugated diene” however has its two double bonds separated by one single bond. As such, why is a conjugated diene considered more stable than an isolated diene?

A. Due to decreased stability as a result ofelectron delocalization
B. Due to sigma electron pair conjugation
C. Due to electron delocalization and orbital hybridization of the C-C single bonds
D. Due to the geometry of the cumulated dorbitals of the existing double bonds

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Answer: C

On the Surface: The pi electrons in the double bonds of an isolated diene are localized between two carbons whereas the pi electrons in a conjugated diene are delocalized over a wider area which further stabilizes a molecule. If you were aware that delocalization of electrons (= pi electrons) resulted in greater stability, that would have gotten you the correct answer.

Going Deeper: In addition to resonance,hybridization energy affects stability. For example, in 1,3-butadiene the carbons with the single bond are sp2 hybridized unlike in nonconjugateddienes where the carbons with single bonds are sp3 hybridized. This difference in hybridization shows that the conjugated dienes have more 's' character and draw in more of the pi electrons, thus making the single bond stronger and shorter than an ordinary alkane C-C bond.

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Organic Chemistry Mechanisms

 

[mcat prep]

Try this Psychology MCAT practice question and tell us your answer.

In the field of psychophysics, what is the name of the process that converts sensory input into an action potential?
A. Translation
B. Conversion
C. Transduction
D. Transformation

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[mcat prep]

Try this Psychology MCAT practice question and tell us your answer.

In the field of psychophysics, what is the name of the process that converts sensory input into an action potential?
A. Translation
B. Conversion
C. Transduction
D. Transformation

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Answer is C. Transduction refers to how sensory receptors interact with specific stimuli. For example, taste cells interact with bitter or sweet tastes. This interaction changes the cells' action potential and brings about a series of physiological and neurological reactions, which may reach the nervous system and become a perception.

 

[mcat prep]

Try this Sociology MCAT practice question and tell us your answer.

A teenage student who wants to excel at school but also hangs out with her friends might experience:

A. role exit.
B. role engulfment.
C. role strain.
D. role conflict.

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