Biochem - Mock Exam

All are true about ΔG EXCEPT?

ΔG is negative for endergonic reactions

For the reaction of ATP + H2O → ADP + Pi + H⁺, the biochemical standard state conditions would include all of the following EXCEPT:

the concentration of water would be 1 M 

The unrivaled ability to form ___ hydrogen bonds per liquid water molecule is the source of the strong intermolecular attractions unique to water

4

Buffers have all of the following characteristics EXCEPT:

they buffer best for polyprotic acids halfway between the two pKa values

Which of the following amino acids has more than one chiral carbon?

thereonine

At which of the following pH values would histidine (pKa values of 1.8, 6.0 and 9.2) be found with a net negative charge?

11.0

Which of the following levels of protein structure is correctly defined?

tertiary: three-dimensional arrangement of all atoms in a single peptide

Edman degradation will: 

determine the N-terminal amino acid

The structural integrity of supramolecular complexes (assemblies) of multiple components are bonded to each other by all of the following forces EXCEPT:

covalent bonds

Membrane structures are maintained primarily by:

hydrophobic interactions