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The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids.

In a plant cell, the plasma membrane is found beneath the cell wall. The plasma membrane is capable of being selectively permeable because of its structure. It is composed of a bilayer of phospholipids interspersed with proteins.

Answer and Explanation: Large molecules, polar molecules, and ions, cannot easily pass through the cell membrane. Large molecules, such as glucose, amino acids, and proteins, are simply too big to fit through the phospholipid bilayer.

Selective permeability of the cell membrane refers to its ability to differentiate between different types of molecules, only allowing some molecules through while blocking others.

Constriction is a non-spontaneous process which involves large membrane deformations at the site of fission, a division route entailing a strong breakage of symmetry in the mother cell.

Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell. This is important for the cell to maintain its internal order irrespective of the changes to the environment.

Examples of Selectively Permeable Membranes The most common example is the phospholipid bilayer cell membrane that surrounds every cell in our bodies. Another example of a selectively permeable membrane is the inner membranes of an egg. All cells in our body are surrounded by a phospholipid bilayer.

The hallmark of passive transport across cell membranes is that it doesn't use energy. Passive transport occurs when molecules move down their concentration gradients from high to low concentration.