Question:

Match List-I with List-II

List-I (Process)List-II (Element)
(A) Transformation(I) Bacteriophages
(B) Transduction(II) Spontaneous
(C) Conjugation(III) Free DNA from Environment
(D) Mutation(IV) Pilus

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Remember:
- Transformation = Naked DNA
- Transduction = Phage virus
- Conjugation = Sex pilus
These three associations are fundamental to bacterial genetics.
  • (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
  • (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
  • (A) - (I), (B) - (III), (C) - (IV), (D) - (II)
  • (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
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The Correct Option is B

Solution and Explanation

Step 1: Understanding the Concept:
This matching question covers the mechanisms of genetic transfer and variation in bacteria, which are crucial for the spread of antibiotic resistance.
Detailed Explanation:
Let us match the genetic processes in List-I with their corresponding mediators or characteristics in List-II:
- (A) Transformation: The process by which a competent bacterium imports and integrates (III) free naked DNA from the surrounding environment into its chromosome.
- (B) Transduction: The transfer of bacterial DNA from one bacterium to another mediated by a bacterial virus, known as a (I) bacteriophage.
- (C) Conjugation: The direct transfer of genetic material between two bacterial cells in physical contact, mediated by a specialized protein tube called a sex (IV) pilus.
- (D) Mutation: A random heritable change in the nucleotide sequence of a cell's DNA, which can occur (II) spontaneously during DNA replication.
This yields the matched sequence:
\[ \text{(A) - (III), (B) - (I), (C) - (IV), (D) - (II)} \]

Step 2: Final Answer:

The correct matching sequence corresponds to Option (B).
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