General

During bioconversion of sucrose to citric acid by Aspergillus niger, final samples of 6 batches of fermentation broth were analyzed for citric acid content. The results (in g L⁻¹) were found to be 47.3, 52.2, 49.2, 52.4, 49.1 and 46.3. Q54 The mean value of acid concentration will beA 49.4B 51.0C 48.2D 50.8 Q55 The … Read more

The standard redox potential values for two half‐reactions are given below. The value for Faraday’s constant is 96.48 kJ V⁻¹ mol⁻¹ and gas constant R is 8.31 J K⁻¹ mol⁻¹.NAD⁺ + H⁺ + 2 e⁻ ⇌ NADH –0.315 VFAD + 2 H⁺ + 2 e⁻ ⇌ FADH₂ –0.219 V Q52 The ΔG°′ for the oxidation of NADH … Read more

The width of the lipid bilayer membrane is 30 Å. It is permeated by a protein which is a right‐handed α‐helix. Q50 The number of α-helical turns permeating the membrane isA 5.6 turnsB 3.5 turnsC 6.5 turnsD 5.0 turns Q51 The number of amino acid residues present in the protein isA 15B 18C 17D 20

A culture of Rhizobium is grown in a chemostat (100 m³ bioreactor). The feed contains 12 g L⁻¹ sucrose, Ks for the organism is 0.2 g L⁻¹ and μₘ = 0.3 h⁻¹. The flow rate required to result in steady‐state concentration of sucrose as 1.5 g L⁻¹ in the bioreactor will beA 15 m³ h⁻¹B … Read more

Write and account on enumeration of bacteria in a food sample.

how CHD diesease occurs