The Question is from neet-botany biological-classification , and it was created by the author D VINOD

Question

Bacterial flagella do not show ATPase activity and 9+2 organization. These are chemically formed of

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [A]
## CONCEPT FRAMEWORK
	**Primary Concept**: Structure of bacterial flagella
	**Related Topics**: Prokaryotic cell structure, flagellar motility
	**Prerequisites**: Basic knowledge of cell biology and microbiology
## SOLUTION PATHWAY
**Given Information**:
		- Bacterial flagella lack ATPase activity.
		- No 9+2 microtubule arrangement.
		- Question focuses on the chemical composition of bacterial flagella.
**Method & Steps**:
	1. Identify the components of bacterial flagella.
		Reasoning: Bacterial flagella differ from eukaryotic flagella in structure and composition.
		Formula/Rule: Bacterial flagella are primarily made of flagellin.
	2. Consider the alternatives provided in the options.
		Working: Analyze each option in terms of known flagellar components.
		Key Point: Flagellin is a protein that polymerizes to form the filament of the bacterial flagellum.
	3. Confirm that the correct option corresponds to the structure of bacterial flagella.
		Result: The constituent of bacterial flagella is flagellin.
		Verification: None of the other options (pilin, tubulin, bacterin) are components of bacterial flagella.
## OPTION ANALYSIS
[A] ✓: Flagellin is indeed the protein that makes up bacterial flagella, aligning with the known structure of prokaryotic motility structures.
[B] :x: Pilin is a component of pili, which are different structures and not related to flagella.
[C] :x: Tubulin is the protein that makes up eukaryotic microtubules, not involved in bacterial flagella.
[D] :x: Bacterin is not a structural protein, but refers to a preparation of killed or inactivated bacteria used in vaccines.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing flagellin with tubulin: Remember that flagellin is specific to bacterial flagella, while tubulin is found in eukaryotic structures.
		2. Misidentifying the role of pili: Pili are different from flagella and serve different functions in bacterial adhesion and conjugation.
	**Quick Tips**:
		1. Associate flagellin with motility in bacteria to recall its function.
		2. Remember the structure of eukaryotic flagella is characterized by the 9+2 arrangement, which helps differentiate between bacterial and eukaryotic flagella.

D VINOD · Answer

The correct Option is "Flagellin"

D VINOD · Answer

Pilin

D VINOD · Answer

Tubulin

D VINOD · Answer

Bacterin

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