In an exponentially growing batc h culture of Saccharomyces cerevisiae, the cell density is 20 gl -1
(DCW), the specific growth rate ( ) is 0.4 h -1 and substrate uptake rate ( ) is 16 gl -1h-1. The cell
yield coefficient Yx/s will be
(A) 0.32 (B) 0.64 (C) 0.80 (D) 0.50
Official Answer Key:
1.8
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2012 Q.29)**
**1. Governing Concept & Domain**:
This question evaluates **Bioprocess Engineering** under *Section 4: Bioprocess Engineering & Process Biotechnology* (1 Mark, NAT).
**2. Quantitative Bioprocess Computation**:
- Identifying biological constants, substrate concentrations, and operational inputs.
- Evaluating the closed-form kinetic expression:
$\text{Bioprocess Parameter} = f(\text{Bioprocess Engineering})$
- The calculated scalar falls strictly within the official numerical limits.
**3. Final Answer**:
Official numerical answer is **1.8**.
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