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04-BS-13: December 2016

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

  1. Question 1 Plant Cell Wall, Pigments, Turgor Pressure, and Cereal Grain Structure
  2. Question 2 Continuous Fermenter — Unsteady-State Cell Mass Balance
  3. Question 3 Single-Cell Protein from Hexadecane — Stoichiometric Coefficients
  4. Question 4 Oxygen Demand With vs. Without Growth; Maximum Biomass Yield From Glucose vs. Ethanol
  5. Question 5 Citric Acid Fermentation — Cooling Requirement
  6. Question 6 Prokaryotes vs. Eukaryotes, Fungal Classes, Protozoa vs. Algae, Gram-Stain Cell Envelope
  7. Question 7 Batch Mold Growth Kinetics — Specific Growth Rate, Yield, and Scale-Up
  8. Question 8 Cytoplasm, Nucleus, Ribosome/Chloroplast/Mitochondria, Bacterial Shape Classes

Start with Question 1 →

National Exams — December 2016 — 04-BS-13, Biology. Three-hour, closed-book exam (one double-sided aid sheet permitted, approved 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. Q2–Q5 and Q7 are calculation/derivation questions; Q1, Q6, and Q8 are essay questions.

Reference texts: Shuler & Kargi, Bioprocess Engineering: Basic Concepts (2nd ed., Prentice Hall) — elemental/electron balances, yield coefficients, fermenter mass and energy balances, growth kinetics; Madigan et al., Brock Biology of Microorganisms (15th ed., Pearson) — bacterial/eukaryotic cell structure, fungi, protozoa/algae, Gram-stain cell envelope; Toledo, Fundamentals of Food Process Engineering (3rd ed., Springer) — plant tissue structure and cereal grain morphology.