The barrier between the protoplasm and the outer environment in an animal cell is (a) cell wall (b) plasma membrane (c) nuclear membrane (d) cytoplasm
Answers
(b) plasma membrane
The plasma membrane is comprised of a phospholipid bilayer, which is a couple of layer of phospholipid. These are the lipids with which phosphate group is attached.
It is the biological membrane which administers the internal sides of all cells from the external environment. This also helps in protecting the cell which comprised of a lipid bilayer in which proteins are embedded.
In animal cell, (b) plasma Membrane is separation between protoplasm and outer environment.
Explanation:
Plasma membrane protects cell from surrounding environment. This membrane consists of phospholipids, embedded proteins and carbohydrates along with some of proteins. Plasma membrane is selectively permeable and helps to enter the molecules which are allowed to enter into the cell.
It coordinates the substance movement inside and outside cell. In other words it is known as cell membrane or cytoplasmic membrane.