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04-BS-13: Undated paper

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

  1. Question 1 Bioreactor Design Data and Mode-of-Operation Selection
  2. Question 2 Water Relations in Plant and Animal Cells
  3. Question 3 Hexadecane Growth — Elemental Balance, RQ, Yield, Heat Generation
  4. Question 4 Yeast Growth on Glucose — Observed vs. Maintenance-Corrected Yields
  5. Question 5 Electron-Balance Derivation of the Biomass-Yield–RQ Relation
  6. Question 6 Cooling-Duty Estimate for an Alginate Fermentation
  7. Question 7 Bacterial Morphology, Prokaryotes vs. Eukaryotes, and Virus Characteristics
  8. Question 8 Fungi and Comparative Virus Biology
  9. Question 9 Diauxic Growth of E. coli on Glucose/Lactose

Start with Question 1 →

National Exam — May 2019, 04-BS-13, Biology. Three-hour, closed-book exam (one double-sided aid sheet permitted, approved Casio/Sharp calculator allowed). Format: Part I lists six 20-mark questions (Q1–Q6), and the instruction requires 3 of the 6, one from each pair (1&2), (3&4), (5&6); Part II lists three 20-mark questions (Q7–Q9), any 2 of 3. Together this matches the notice page's "FIVE questions constitute a complete exam" (3 + 2 = 5). All nine questions are solved below for completeness. Q4's stoichiometric equation (page 2) and its lettered sub-parts (page 3, "Given the following parameters for cell growth…") are one continuous question split across a page break not two separate questions; they are combined here. The source's page-3/4 footer reads "May 2018" against page-1/2's clear "May 2019" header. Q3, Q4, Q5, Q6, and Q9 are calculation/derivation questions; Q1, Q2, Q7, and Q8 are essay/qualitative questions.

Reference texts: Shuler & Kargi, Bioprocess Engineering: Basic Concepts (2nd ed., Prentice Hall) — elemental/electron balances, yield coefficients, maintenance (Pirt/Luedeking–Piret) corrections, respiratory quotient, fermenter energy balances; Madigan et al., Brock Biology of Microorganisms (15th ed., Pearson) — bacterial morphology, prokaryote/eukaryote comparison, viruses, fungi, diauxic growth and the lac operon; Toledo, Fundamentals of Food Process Engineering (3rd ed., Springer) — water activity and sorption.