Exam (elaborations) Biochemistry Final Exam Biochemistry Final Exam 1) Calculate the enthalpy of formation per mol of NH3: Bond energies: H2, 436k KJ/mol; N2, 945 KJ/mol, N-H, 391 KJ/mol a) -93 KJ b) -1080 KJ c) 1080 KJ d) 45 KJ e) -46.5 KJ 2) Membrane structures are held primarily by? (OR membrane fs in a lipid bilayer are held together primarily by?) a) Hydrophobic interactions b) Covalent bonds c) Ionic Interactions d) All of the Above 3) Which system corresponds to the intrac...