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04-BS-13: May 2013

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

  1. Question 1 Elemental & Electron Balance for Clostridium acetobutylicum Fermentation
  2. Question 2 Batch Fermentation Mass Balance — Ethanol and Propenoic Acid Yield
  3. Question 3 Energy Balance on a Continuous Fermenter
  4. Question 4 Aerobic Growth Stoichiometry of S. cerevisiae on Ethanol
  5. Question 5 Protective, Conductive and Ground Tissues in Plant/Animal Material
  6. Question 6 Rheology of Biological Material — Cell Size, Shape, Volume and Intercellular Spaces
  7. Question 7 Water Movement, Free vs. Bound Water, and Water Activity
  8. Question 8 Morphological Organization and Physical Handling/Processing
  9. Question 9 Bacterial Morphology, Prokaryote vs. Eukaryote, and Culture Media
  10. Question 10 Virus Morphology and the Beneficial/Harmful Roles of Fungi

Start with Question 1 →

National Exams — May 2013 — 04-BS-13, Biology. Three-hour, closed-book exam (one double-sided aid sheet permitted, approved Casio/Sharp calculator allowed). Format: Part I offers 6 questions (any 3 constitute a complete answer, 20 marks each) and Part II offers 4 questions (any 2 constitute a complete answer, 20 marks each) — a full paper is 5 questions. All 10 are solved below for completeness. Most questions require an essay-format answer; Q1–Q4 are calculation questions.

Reference texts: Shuler & Kargi, Bioprocess Engineering: Basic Concepts (2nd ed., Prentice Hall) — elemental/electron balances, yield coefficients, fermenter energy balances; Madigan et al., Brock Biology of Microorganisms (15th ed., Pearson) — bacterial/viral/fungal morphology and physiology; Toledo, Fundamentals of Food Process Engineering (3rd ed., Springer) — plant/animal tissue structure, rheology, water activity.