Thermodynamic Parameters (Entropy, Enthalpy, Free Energy, and Internal Energy) Are

question 33

Multiple Choice

Thermodynamic parameters (entropy, enthalpy, free energy, and internal energy) are given for an unknown enzyme. Explain which results would be expected for the breaking of hydrogen bonds and the exposure of hydrophobic groups from the interior during the unfolding process of a protein.

• A) Entropy change, ΔS, is zero
• B) Enthalpy change, ΔH, is positive
• C) The reaction is spontaneous
• D) Enthalpy change, ΔH, is negative
• E) Entropy change, ΔS, is positive

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Definitions:

Cis-trans Isomers

Stereoisomers that have the same molecular formula and sequence of bonded atoms but differ in the orientation of groups about a double bond.

Constitutional Isomers

Compounds that have the same molecular formula but differ in the sequence of bonding of their atoms.

Isomeric

Pertains to molecules that have the same molecular formula but different structures.

Sigma Bonds

The strongest type of covalent chemical bond, formed by the direct overlap of atomic orbitals, with the electrons shared in an area centered on a line running between the nuclei.