The Question is from neet-botany biological-classification , and it was created by the author Mr. NARESH KUMAR K

Question

Which of the following statements accurately differentiates Archaebacteria from Eubacteria?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Differences between Archaebacteria and Eubacteria
 **Related Topics**: Cell wall structure, cell membrane composition, genetics of prokaryotes
 **Prerequisites**: Basic understanding of prokaryotic cell structure and function.
## SOLUTION PATHWAY
**Given Information**:
Four statements comparing Archaebacteria and Eubacteria.
**Method & Steps**:
1. Analyze each statement to determine its accuracy.
   Reasoning:  We need to identify the statement that correctly highlights a key difference between Archaea and Bacteria.
   Formula/Rule: None directly applicable; relies on biological knowledge.
2. Evaluate option A: Archaebacteria have peptidoglycan in their cell walls, while Eubacteria do not. 
   Working: This is incorrect. Eubacteria typically have peptidoglycan in their cell walls, while Archaea do not.
3. Evaluate option B: Archaebacteria lack introns in their genes, while Eubacteria have introns.
   Working: This is an oversimplification. While introns are less common in Archaea than in Eubacteria, it's not a universal difference.  Some archaea *do* have introns.
4. Evaluate option C: Archaebacteria have branched chain lipids in their cell membranes, while Eubacteria have straight chain lipids.
   Working: This is correct.  A major difference lies in the lipid composition of their cell membranes. Archaea have branched chain lipids, while Bacteria have straight chain lipids.
5. Evaluate option D: Archaebacteria are sensitive to antibiotics, while Eubacteria are resistant.
   Working: This is incorrect.  Many Eubacteria are sensitive to antibiotics, while Archaea generally exhibit resistance to antibiotics that target Eubacteria.
    Result: Option C accurately differentiates Archaebacteria and Eubacteria.
    Verification:  The unique branched-chain lipid structure in archaeal membranes is a well-established characteristic.
## OPTION ANALYSIS
A :x: Incorrect. Eubacteria, not Archaebacteria, have peptidoglycan in their cell walls.
B :x: Incorrect. The presence or absence of introns is not a consistent differentiating factor.
C ✓: Correct. Archaea have branched-chain lipids, while Bacteria have straight-chain lipids in their cell membranes.
D :x: Incorrect.  Antibiotic sensitivity is not a reliable differentiating factor between the two groups.
## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the characteristics of Archaea and Bacteria: Thoroughly learn the key differences between these two domains.
  2.Overgeneralizing about introns: Remember that the presence or absence of introns is not a defining characteristic.
 **Quick Tips**:
  1.Focus on the unique features of Archaea, such as their branched-chain lipids and lack of peptidoglycan.
  2.Remember the three domains of life: Bacteria, Archaea, and Eukarya.

Mr. NARESH KUMAR K · Answer

Archaebacteria have peptidoglycan in their cell walls, while Eubacteria do not.

Mr. NARESH KUMAR K · Answer

Archaebacteria lack introns in their genes, while Eubacteria have introns.

Mr. NARESH KUMAR K · Answer

The correct Option is "Archaebacteria have branched chain lipids in their cell membranes, while Eubacteria have straight chain lipids."

Mr. NARESH KUMAR K · Answer

Archaebacteria are sensitive to antibiotics, while Eubacteria are resistant.

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