Find the true statement.

Biology Biotechnology Principles and Processes Processes of Recombinant DNA Technology Single Correct MCQ

Published on: August 13, 2026

Ori means origin of transcription.

Some bacterial cell may have copy number of plasmid that varies from 15–100.

Vector should have many recognition sites for commonly used restriction enzymes so that alien DNA can attach to any one of the sites easily.

TetR gene in pBR322 can be cleaved by PvuI and PstI.

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The correct answer is:

Some bacterial cell may have copy number of plasmid that varies from 15–100. This statement is true. The copy number refers to the total number of plasmid molecules present within a single host bacterial cell. Depending on the specific type of plasmid and its replication control machinery, this number fluctuates significantly—ranging from just 1–2 copies per cell up to 15–100 or even higher.

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