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Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology: Principles and Processes2 Marks
Question
What does ‘competent’ refer to in competent cells used in transformation experiments?
✓

Answer

The ability of the bacterial cell to take up DNA through pores in cell wall is called competent. DNA is a hydrophilic molecule and hence, it cannot pass through the cell membrane. So, cell is made ‘competent’ by treating with suitable divalent ion; like calcium.

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