Biology Biotechnology Principles and Processes Cloning Vectors and Competent Host Single Correct MCQ
Published on: August 11, 2026

For a plasmid to be a cloning vector, the minimum numbers of elements required are

A
origin of replication, multiple cloning site, selection marker
B
origin of replication, multiple cloning site, selection marker, promoter
C
origin of replication, multiple cloning site, selection marker, translational start site
D
origin of replication, multiple cloning site, promoter

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Text Solution

Verified by Experts
The correct answer is:
A

A cloning vector must have:

• Ori → for replication

• MCS → for DNA insertion

• Selectable marker → for identifying transformed cells

Promoter and translational start site are not essential for a basic cloning vector.

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