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Why are competent host cells required in recombinant DNA technology?

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To enhance the nutritional value of the host cells.

To enable the host cells to take up foreign DNA more efficiently.

To make the host cells resistant to antibiotics.

To increase the size of the host cells.

answer is B.

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Detailed Solution

Since DNA is a hydrophilic molecule, it cannot pass through cell membranes. Why? In order to force bacteria to take up the plasmid, the bacterial cells must first be made ‘competent’ to take up DNA.

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