1. The net charge of aspartate in a solution at pH 7 is: A. -1 B. -0.5 C. +0.5 D

ID: 78022 • Letter: 1

Question

1. The net charge of aspartate in a solution at pH 7 is:

A. -1

B. -0.5

C. +0.5

D. +1

E. +1.5

2. The aggregation of nonpolar molecules or groups in water is thermodynamically favorable due to the

A. increased entropy of the water molecules.

B. decreased enthalpy of the system.

C. increased entropy of the nonpolar molecules when they associate.

D. very strong van der Waals forces among the nonpolar molecules or groups.

3. Pyruvate dehydrogenase complex can be categorized as this type of enzyme:

A. Oxidoreductase

B. Transferase

C. Hydrolase

D. Lyase

E. Isomerase

4.An enzyme inhibitor causes an increase in the apparent KM value, but not the apparent Vmax value. It must be

A. a competitive inhibitor.

B. an irreversible inhibitor.

C. an uncompetitive inhibitor.

D. a mixed inhibitor.

E. a mechanism based inhibitor.

5. Triacylglycerols are not found in cell membranes because they are

A. not amphipathic.

B. amphipathic.

C. not abundant in cells.

D. charged at biological pH.

1.The correct option is A

2. The correct option is A

3. The correct option is A because the complex causes the oxidation of the pyruvate molecule.

4. The correct option is A competitive inhibitor as it utilizes a higher concentration of substrate to increase the Km.

5. The correct option is A because they lack both the hydrophilic and hydrophobic parts.

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.