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04-BS-13: December 2018

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Nitrogen Requirement and Ethanol Yield in Fermentation
  2. Question 2 Baker's Yeast Growth — Batch Reactor Media Requirements
  3. Question 3 Backyard Fermenter — Cooling-Water Energy Balance
  4. Question 4 Theoretical Yield Coefficients — ATP Method and Recombinant Protein Production
  5. Question 5 Rheology and Gross Structure of Biological Materials
  6. Question 6 Bacterial Nutrition, Media Types, Transport Mechanisms, and Cell-Wall Structure
  7. Question 7 Pure Culture Technique, Fermentation vs. Respiration, and Media Diversity
  8. Question 8 Sterilization Methods and Refrigeration of Pasteurized Milk

Start with Question 1 →

National Exams — December 2018 — 04-BS-13, Biology. Three-hour, closed-book exam (one double-sided aid sheet permitted, approved Casio/Sharp calculator allowed). Format: Part I offers 5 questions (any 3 constitute a complete answer, 20 marks each) and Part II offers 3 questions (any 2 constitute a complete answer, 20 marks each) — a full paper is 5 questions. All 8 numbered questions are solved below for completeness (renumbered Q1–Q8 continuously: Q1–Q5 = Part I, Q6–Q8 = Part II). Q1, Q2, Q3, and Q4 are calculation/stoichiometry questions; Q5, Q6, Q7, and Q8 are essay questions.

Reference texts: Shuler & Kargi, Bioprocess Engineering: Basic Concepts (2nd ed., Prentice Hall) — elemental/electron balances, yield coefficients, maintenance-associated product formation, fermenter mass and energy balances; Madigan et al., Brock Biology of Microorganisms (15th ed., Pearson) — bacterial nutrition, transport mechanisms, cell-wall structure, pure-culture technique, sterilization methods; Toledo, Fundamentals of Food Process Engineering (3rd ed., Springer) — plant/animal tissue rheology and gross structure.