Question

Match the type of bacterial flagella in Group I with their definitions in Group II 
         Group I                          Group II 
(P) Monotrichous           (1) Flagella only at both poles of the cell 
(Q) Peritrichous              (2) Two or more flagella at one pole of the cell 
(R) Lophotrichous          (3) Flagella distributed over the entire cell 
(S) Amphitrichous          (4) A single polar flagellum 
 

• A. P-4, Q-1, R-2, S-3
• B. P-4, Q-3, R-1, S-2
• C. P-3, Q-2, R-1, S-4
• D. P-2, Q-4, R-1, S-3

Hint:

Flagella distribution in bacteria varies: monotrichous has a single flagellum, lophotrichous has multiple at one pole, amphitrichous has flagella at both poles, and peritrichous has flagella all over the cell.

Answer 1

The Correct Option is B

Step 1: Understanding bacterial flagella types. 
- Monotrichous: A single flagellum at one pole of the cell (P-4). 

- Peritrichous: Flagella distributed over the entire cell (Q-3). 

- Lophotrichous: Two or more flagella at one pole of the cell (R-1). 

- Amphitrichous: Flagella at both poles of the cell (S-2). 
 

Step 2: Analyzing the options. 
(A) P-4, Q-1, R-2, S-3: Incorrect — The pairings do not match. 
(B) P-4, Q-3, R-1, S-2: Correct — This correctly matches the types of flagella with their definitions. 
(C) P-3, Q-2, R-1, S-4: Incorrect — These pairings are incorrect. 
(D) P-2, Q-4, R-1, S-3: Incorrect — These pairings are incorrect. 
 

Step 3: Conclusion. 
The correct answer is (B) P-4, Q-3, R-1, S-2.