MCAT 13

C/P

100

Field lines show the activity of a ______ test charge.

(positive or negative)

Field lines show the activity of a positive test charge

200

Is BF₃ a polar or non-polar molecule? Why?

non-polar because even though B-F bond is polar, the symmetrical geometry makes the overall molecule non-polar.

300

A/an _______ line is a line on which the potential at every point is the same.

A/an equipotential line is a line on which the potential at every point is the same.

400

Is Mn oxidized or reduced in the following reaction?

2HCl + H₂O₂ + MnO₂ → O₂ + MnCl₂ + 2H₂O

Mn is reduced from +4 to +2

500

Which of the following are common reducing agents? (pick as many as are correct)

B₂H_6, I₂, H₂SO₄, CrO₃, NAD⁺, NADH

Reducing agents get OXIDIZED, and oxidation is losing electrons. Therefore, reducing agents often contain metal ions or hydrides (H-).

Answers: B₂H_6, NADH

BIO

100

Esters are given what IUPAC suffix?

-oate

200

The GI tract, respiratory tract, bronchi, bladder, and stomach are all formed in early development from which 1 of the 3 germ layers?

Endoderm

300

What does pepsin do and where is it secreted from?

the stomach and breaks down proteins

400

What do parietal cells secrete?

Intrinsic factor and HCL

500

What are the 7 hormones produced by the hypothalamus?

GhRH, GnRH, Dopamine (PIF), Vasopressin (ADH), Oxytocin, TRH, CRH

BIOCHEM

100

Name all of the pyrimidine bases

cytosine, thymine, and uracil.

CUT the PY

200

What are the approximate pKa's of the carboxy and amino groups of an amino acid? (Doesn't have to be exact, just whole number value.)

Carboxy pKa = ~1-2

Amino pKa = ~8-10

300

The ribose in nucleotide triphosphate is what type of sugar molecule?

pentofuranose

P/S

100

What is parallel processing?

parallel processing is the idea that our eyes process color, form and motion at the same time.

200

_________ asserts that various parts of society work together to maintain dynamic equilibrium (ie, societal balance)

Functionalism

300

(2 words)_____-______ bias occurs when success is credited to internal factors but failure is blamed on external factors.  For example, a good grade is attributed to being smart (internal), whereas a bad grade is attributed to the questions being unfair (external).

Self-serving bias

400

Which neuroimaging technique is best used for measuring changes in blood oxygenation in the brain over time?

(fMRI) functional magnetic resonance imaging

500

Which neuroimaging technique is best used for measuring changes in glucose metabolism in different parts of the brain?

(PET) Positron Emission Tomography

Formulas, Units and Constants

100

What is the fundamental unit of charge on a proton or electron? e = ? (include units)

e = 1.6 x 10^^-19 Coulombs (C)

200

What is the general formula for enzyme activity? (or explain it)

Enzyme activity = moles of substrate converted per unit time = rate × reaction volume.

300

What is gauge pressure?

P_gauge = P - P_atm = (P₀ +gz) - P_atm

400

What is the formula for angular frequency/velocity?

Angular frequency = 2πf         or

Angular frequency = (2π)/T