Q. Which one of the following need NOT be conserved in a biochemical reaction? (A) Total mass (B) Total moles (C) Number of atoms of each element (D) Total energy Ans: Total moles

Q. Which one of the following is catabolized during endogenous metabolism in a batch bacterial cultivation? (A) internal reserves (B) extracellular substrates (C) extracellular products (D) toxic substrates Ans: internal reserves Solution: During endogenous metabolism in a batch bacterial cultivation, internal reserves are catabolized. Endogenous metabolism occurs when the extracellular substrates in the culture medium

Q. Which one of the following can NOT be a limiting substrate if Monod’s growth kinetics is applicable? (A) Extracellular carbon source (B) Extracellular nitrogen source (C) Dissolved oxygen (D) Intracellular carbon source Ans: Intracellular carbon source Solution: In Monod’s growth kinetics, the rate of microbial growth is described by the Monod equation, which considers

Q. Which one of the following statements is CORRECT for enzyme catalyzed reactions? (𝛥𝐺 is Gibbs free energy change, 𝐾𝑒𝑞 is equilibrium constant) (A) Enzymes affect 𝛥𝐺, but not 𝐾𝑒𝑞 (B) Enzymes affect 𝐾𝑒𝑞, but not 𝛥𝐺 (C) Enzymes affect both 𝛥𝐺 and 𝐾𝑒𝑞 (D) Enzymes do not affect 𝛥𝐺 or 𝐾𝑒𝑞 Ans: Enzymes affect

Q. A mutation in a gene that codes for a polypeptide results in a variant polypeptide that lacks the last three amino acids. What type of mutation is this? (A) Synonymous mutation (B) Nonsense mutation (C) Missense mutation (D) Silent mutation Ans: Nonsense mutation Solution: A nonsense mutation is a type of mutation in which