Biology Biotechnology Principles and Processes Tools Of Recombinant DNA Technology Single Correct MCQ
Published on: August 13, 2026

The terms "competent" refers to

A
Increasing the competition between cells
B
Making cell impermeable for DNA
C
Increasing the efficiency with which DNA enters the bacterium through pores in its cell wall.
D
Making cells permeable for divalent cations

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The correct answer is:
C

In genetic engineering, “competent cells” are bacteria that have been treated (e.g., with CaCl 2 or electroporation) so that they can take up foreign DNA more efficiently through pores in the cell wall/membrane.

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