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Question #46945
The Question
Archaebacteria occupy a distinct evolutionary branch, exhibiting a unique mosaic of bacterial and eukaryotic features. Which of the following statements regarding their cellular and molecular biology is INCORRECT?
Options
- A.
Their cell membrane consists of branched-chain lipids linked by ether bonds, providing high resistance to extreme temperatures and pH.
- B.
Their informational machinery, including the complexity of RNA polymerase, shows a closer evolutionary affinity to Eukarya than to Eubacteria.
- C.
Their remarkable survival in extreme habitats is primarily attributed to a highly cross-linked peptidoglycan cell wall.
- D.
They lack membrane-bound organelles but possess circular DNA that is often associated with histone-like proteins.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Archaebacteria Cell Wall Composition|Metabolism vs. In-vitro Reactions|Evolution
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The 'Prokaryotic Homogeneity Fallacy'.
Students often assume all organisms in Kingdom Monera possess peptidoglycan cell walls.
The trap leverages the NCERT fact that the Archaebacterial cell wall is responsible for extreme survival, but substitutes the correct biochemical composition (non-peptidoglycan) with the standard Eubacterial one (peptidoglycan), testing if the student understands the exact nature of the divergence.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biological Classification - Class 11 |
| Concept | Archaebacteria Cell Wall Composition |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |