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

Question

Which structural component of a prokaryotic cell exhibits the highest resistance to lysozyme digestion?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Bacterial cell wall structure and lysozyme activity
 **Related Topics**: Gram-positive bacteria, Gram-negative bacteria, Mycoplasma, Bacterial capsules, Peptidoglycan
 **Prerequisites**: Understanding of prokaryotic cell structure, the function of lysozyme, and the differences between Gram-positive and Gram-negative cell walls.
## SOLUTION PATHWAY
**Given Information**:
  The question asks which prokaryotic cell component is most resistant to lysozyme digestion.
  Lysozyme is an enzyme that targets peptidoglycan.
**Method & Steps**:
 1. Analyze the lysozyme target:
  Reasoning: Lysozyme hydrolyzes the β-1,4-glycosidic bonds in peptidoglycan, a major component of bacterial cell walls.
  Formula/Rule: None directly applicable, but understanding the enzyme's mechanism is key.
 2. Compare the cell wall structures:
  Working: Gram-positive bacteria have a thick peptidoglycan layer, making them susceptible to lysozyme. Gram-negative bacteria have a thin peptidoglycan layer sandwiched between two membranes, offering some protection. Mycoplasma lack a cell wall altogether, hence no peptidoglycan to be digested by lysozyme. Bacterial capsules are primarily polysaccharides and are not directly targeted by lysozyme.
  Key Point: The presence and thickness of peptidoglycan are crucial for lysozyme susceptibility.
 3. Identify the most resistant component:
  Result: Mycoplasma membrane shows the highest resistance because it lacks peptidoglycan.
  Verification: The absence of a cell wall in Mycoplasma makes them inherently resistant to lysozyme.
 ## OPTION ANALYSIS
A :x: Gram-positive cell wall:  Has a thick peptidoglycan layer, highly susceptible to lysozyme.
B :x: Gram-negative cell wall: Has a thin peptidoglycan layer, less susceptible than Gram-positive, but still affected.
C ✓: Mycoplasma membrane: Lacks a cell wall and peptidoglycan, therefore completely resistant to lysozyme.
D :x: Bacterial capsule: Composed of polysaccharides, not directly targeted by lysozyme.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the cell wall structures of Gram-positive and Gram-negative bacteria: Focus on the thickness of the peptidoglycan layer.
  2.Overlooking the absence of a cell wall in Mycoplasma: Remember Mycoplasma are atypical bacteria.
 **Quick Tips**:
  1.Remember that lysozyme targets peptidoglycan.
  2.Associate Mycoplasma with the lack of a cell wall.

Mr. NARESH KUMAR K · Answer

Gram-positive cell wall

Mr. NARESH KUMAR K · Answer

Gram-negative cell wall

Mr. NARESH KUMAR K · Answer

The correct Option is "Mycoplasma membrane"

Mr. NARESH KUMAR K · Answer

Bacterial capsule

NEET Botany MCQs

Select Chapter

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

Question Tags

NEET Subjects

Our Bots

Company