NEET Questions Solved

A host cell normally does not take up a foreign DNA until it has been made competent to do so. This is because:

1. DNA is a hydrophilic molecule

2. DNA is a very large molecule

3. there are no receptors for DNA on the cell membrane

4. DNA is an inert molecule

(1) Cell membrane is made of a phospholipid bilayer and allows only lipid soluble substances to diffuse across it.

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