Question

Choose the correct match for structural components of bacteria to their function.

• A. (P)-(ii), (Q)-(iii), (R)-(i), (S)-(iv)
• B. (P)-(ii), (Q)-(i), (R)-(iii), (S)-(iv)
• C. (P)-(ii), (Q)-(i), (R)-(iv), (S)-(iii)
• D. (P)-(i), (Q)-(iv), (R)-(iii), (S)-(ii)

Hint:

Bacterial structures like flagella and magnetosomes serve critical roles in movement and orientation, while the cell wall and granules provide protection and energy storage.

Answer 1

The Correct Option is B

Step 1: Understanding each structural component's function.
- (P) Flagella: Function (ii) Chemotaxis. Flagella are used for movement, allowing bacteria to move toward or away from stimuli (chemotaxis).
- (Q) Cell wall: Function (i) Prevent cell lysis. The cell wall provides structural support and protection against osmotic pressure, preventing lysis.
- (R) Metachromatic granules: Function (iii) Storage for ATP. These granules store phosphate, which is involved in energy storage for the cell.
- (S) Magnetosomes: Function (iv) Cell orientation. Magnetosomes allow bacteria to orient themselves along the Earth's magnetic field, aiding in navigation.
Step 2: Analyzing the options.
- (A) Incorrect, as flagella are involved in chemotaxis, not in cell lysis prevention.
- (B) Correct, as it accurately matches the components with their respective functions.
- (C) Incorrect, as magnetosomes are for orientation, not energy storage.
- (D) Incorrect, as the functions are misassigned.
Step 3: Conclusion.
Thus, the correct answer is (B) (P)-(ii), (Q)-(i), (R)-(iii), (S)-(iv).