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Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : E.coli is widely used as a host in RDT.
Reason (R) : E.coli grows rapidly and its genetics are well understood.
In the light of the above statements, choose the most appropriate answer from the options given below :

This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
Both (A) and (R) are correct and (R) is the correct explanation of (A)

E. coli Host in RDT: Assertion & Reason Analysis

Assertion (A) Evaluation

Assertion (A) states that E. coli is widely used as a host in Recombinant DNA Technology (RDT).

This is factually correct. E. coli is a frequently employed host organism in RDT due to its suitability for genetic manipulation and protein production.

Reason (R) Evaluation

Reason (R) states that E. coli grows rapidly and its genetics are well understood.

This statement is also correct. These specific characteristics are key advantages:

  • Rapid Growth: Enables quick generation of large bacterial populations for experiments and production.
  • Well-understood Genetics: Extensive knowledge of its genome and molecular pathways facilitates predictable genetic engineering.

Relationship Between Assertion and Reason

Reason (R) directly provides the underlying justification for Assertion (A). The rapid growth and comprehensive genetic understanding of E. coli are the primary reasons why it is a preferred and widely used host in RDT.

Conclusion

Both Assertion (A) and Reason (R) are correct statements. Furthermore, Reason (R) accurately explains the validity of Assertion (A).

Therefore, the most appropriate answer is that both (A) and (R) are correct, and (R) is the correct explanation of (A).

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