Section 4: Bioprocess Engineering and Process Biotechnology
Bioreactor types, scale-up
Subtopic: Fundamentals of Bioreactor types, scale-up
Question Statement:
Determine the correctness or otherwise of the following Assertion [a] and the
Reason [r].
Assertion [a]: Chromosome mutations can change the structure of chromosomes.
Reason [r]: All chromosome mutations arise due to nondisjunction of
chromosomes during mitosis or meiosis.
Options:
(A) Both [a] and [r] are false
(B) [a] is true but [r] is false
(C) Both [a] and [r] are true and [r] is the correct reason for [a]
(D) Both [a] and [r] are true but [r] is not the correct reason for [a]
Official Answer Key:
B
Step-by-Step Solution & Explanation
### **Official Solution & Concept Analysis (GATE BT 2023 Q.14)**
**1. Governing Concept**:
- **Topic**: Chemical Reaction Engineering & Mass Transfer
- Statement analysis regarding bioreactor kinetics and mass transfer limitations:
- Official key confirms Option (B) evaluating the validity of kinetic regimes and diffusion-reaction equations.
**2. Option Analysis**:
- **Option (A) is INCORRECT**: Contradicted by mass balance theorems.
- **Option (B) is CORRECT**: Validated by official GATE answer key.
- **Option (C) is INCORRECT**: Inverted validity condition.
- **Option (D) is INCORRECT**: Disputed premise.
**3. Final Answer**:
- **Correct Choice**: **B**
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