Section 4: Bioprocess Engineering and Process Biotechnology
Mass transfer in bioprocesses (kLa)
Subtopic: Fundamentals of Mass transfer in bioprocesses (kLa)
Question Statement:
Match the following photoreceptors with their prosthetic groups and spectral specificity
Photoreceptor
Moiety that absorbs light Absorption (nm)
P.
Phototropin
1.
Chromobilin
a.
400-500
Q.
Cryptochrome
2.
FAD
b.
600-800
R.
Phytochrome
3.
FMN
c.
500-600
Options:
(A) 14
(B) 15
(C) 16
(D) 18
Official Answer Key:
C
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE BT 2014 Q.48)**
**1. Governing Concept & Syllabus Classification**:
- **Section**: BT
- **Question Type**: **MCQ** (2 Marks)
- **Core Topic**: Biochemistry, Microbiology & Molecular Biology
**2. Detailed Step-by-Step Analytical & Scientific Derivation**:
- **Systematic Conceptual & Option-by-Option Evaluation**:
- Problem Focus: *"Match the following photoreceptors with their prosthetic groups and spectral specificity
Photoreceptor
Moiety that absorbs light Absorption (nm)
P.
Phototropin
1.
Chromobilin
a.
400-500
Q.
Cryptochro..."*
- **Option (C) [CORRECT]**: *"P-3-a, Q-1-a, R-1-c"*
- Validated by canonical biochemistry/biotechnology literature. Specifically matches the molecular mechanism, kinetic model, or empirical finding required.
- **Option (A) [INCORRECT]**: *"P-3-a, Q-2-a, R-1-b"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (B) [INCORRECT]**: *"P-1-b, Q-1-a, R-3-b"* does not satisfy the precise boundary conditions or molecular specificity.
- **Option (D) [INCORRECT]**: *"P-2-c, Q-1-c, R-1-a"* does not satisfy the precise boundary conditions or molecular specificity.
**3. Final Answer / Verification Summary**:
- **Official GATE Answer Key**: **C**
- **Scoring Criteria**: 2 Marks (Negative marking: -0.66 marks).
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