What technique is often coupled with a radioimmunoassay to determine that a drug is present in a person?

A) Thin layer chromatography / mass spectrometry
B) Gas chromatography
C) Gas chromatography / mass spectrometry
D) Mass spectrometry

A polypeptide was treated with a certain enzyme to yield the following amino acid sequences. What enzyme was used to induce the observed fragmentations?
Val-Pro-Phe Leu-Ser-Lys-Glu-Trp Arg-Ile-Ser-Ser-Leu-Tyr

In general, when an aqueous solution is heated, what happens to the solubility of ionic compounds within it?

A) Solubility decreases.
B) Solubility increases.
C) Kinetic energy is added by the solute.
D) Kinetic energy is removed by the solute.

PETN is the acronym for what explosive?

A) Pentaethylene glycol
B) Phospho-nitroglycerin
C) Phosphor-ethyl tetranitrate
D) Pentaerythritol tetranitrate

Give the IUPAC name for the cycloalkane shown below.

Which of the following terms best describes the exterior surface of a soap micelle in water?

A) hydrophobic
B) hydrophilic
C) hard
D) saponified
E) hydrogenated

When the volume of a gas decreases, what happens to its temperature if all other factors remain unchanged?

A) It remains constant.
B) It increases.
C) It decreases.
D) A pressure value is also needed to answer this.

What value in an equilibrium reaction does K have if the other values for the reaction HC₂H₃O₂ ⇌ H⁺ + C₂H₃O₂^- are [A^-] = 0.10 M and [HC₂H₃O₂] = 0.25 M?

A) 0.01
B) 0.04
C) 0.03
D) 0.25

What kind of oxygen balance does RDX have?

A) Positive
B) Negative
C) Neutral
D) Not enough information to tell

How does the presence of a catalyst affect an equilibrium system?

A) It lowers the activation energy of the forward reaction.
B) It lowers the activation energy for both reactions.
C) It lowers the activation energy of the reverse reaction.
D) It has no effect.