Question

The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell.
1. plasma membrane
2. nucleoid region
3. ribosome
4. pili
5. cell wall

Answer 1

1. plasma membrane

The plasma membrane is selectively permeable.

Answer 2

1- Plasma membrane as it’s partially permeable which means that it doesn’t allow all substances to pass through while the cell wall is fully permeable which means that it allows all substances to pass through it

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