please check my answers whether they are correct, I need an A++

6. Are any bacteria made of more than one cell?

There are no pluricellular bacteria. All bacteria are unicellular and prokaryotic.

7. What is the plasma membrane of the cell? What are its main functions?5

The plasma membrane is the outer membrane of a cell, it encloses the cell itself, maintaining specific conditions for cellular function within the cell. Since it is selectively permeable, the plasma membrane plays an important role in the entrance and exit of substances.

8. What chemical substances compose the plasma membrane?

The main components of the plasma membrane are phospholipids, proteins and carbohydrates. Phospholipids are amphipathic molecules that are regularly organized in the membrane according to their polarity: two layers of phospholipids form the lipid bilayer, with the polar part of the phospholipids pointing to the exterior part of the layer and the non-polar phospholipid chains toward the interior. Proteins can be found embedded in the lipid bilayer. In addition, there are also some carbohydrates bound to proteins and to phospholipids in the outer surface of the membrane.

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