Questions and Answers

The standard deviation for the above results
(A) 2.49
(B) 2.45
(C) 2.52
(D) 2.40

The mean value of acid concentration
(A) 49.4 g/L
(B) 48.0 g/L
(C) 50.0 g/L
(D) 47.5 g/L

The value of ΔG° given K’eq as 1.7 at 23°C will be
(A) -17.19 kJ mol⁻¹
(B) -19.8 kJ mol⁻¹
(C) +52.82 kJ mol⁻¹
(D) -117.07 kJ mol⁻¹

The number of α-helical turns permeating the membrane
Common Data: The width of the lipid bilayer membrane is 30 Å. It is permeated by a protein which is a right-handed α-helix.
(A) 5.6 turns
(B) 3.5 turns
(C) 6.5 turns
(D) 5.0 turns

The ΔG° for the oxidation of NADH by FAD
Statement: The standard redox potential values for two half-reactions are given.
NAD⁺ + H⁺ + 2e⁻ ↔ NADH -0.315 V
FAD + 2H⁺ + 2e⁻ ↔ FADH₂ -0.219 V
(A) -9.25 kJ mol⁻¹
(B) -103.04 kJ mol⁻¹
(C) +51.52 kJ mol⁻¹
(D) -18.5 kJ mol⁻¹

The number of amino acid residues present in the protein
Common Data: The width of the lipid bilayer membrane is 30 Å. It is permeated by a protein which is a right-handed α-helix.
(A) 15
(B) 18
(C) 20
(D) 17

The flow rate required to result in a steady-state concentration of sucrose as 1.5 g/L in the bioreactor
Common Data: A culture of Rhizobium is grown in a chemostat (100 m³) bioreactor. The feed contains 12 g/L sucrose, Ks for the organism is 0.2 g/L and μm = 0.3 h⁻¹.
(A) 15 m³/h
(B) 26 m³/h
(C) 2.6 m³/h
(D) 150 m³/h