Which of the following statement best describes the fluid mosaic model of plasma membrane?
Which of the following statements best describes the fluid mosaic model of the plasma membrane? right answer feedback: The fluid mosaic model of the plasma membrane is composed of two layers of lipid molecules with protein molecules dispersed within.
What is correct about the fluid mosaic model?
According to fluid mosaic model of Singer and Nicolson, the plasma membrane has a continuous lipid bilayer having integral protein molecules embedded at places.
Which of the following is correct regarding plasma membrane?
Answer (c) It is fluid mosaic and selectively permeable.
Why plasma membrane is known as fluid mosaic model?
Explanation: It is sometimes referred to as a fluid mosaic because it has many types of molecules which float along the lipids due to the many types of molecules that make up the cell membrane. … The liquid part is the lipid bilayer which floats along the lipids due to the many types of molecules that make up the cell.
Who proposed fluid mosaic model of cell membrane?
The fluid mosaic hypothesis was formulated by Singer and Nicolson in the early 1970s . According to this model, membranes are made up of lipids, proteins and carbohydrates (Figure 1).
Why fluid mosaic model is popularly accepted?
Biological Membranes are very small (7-10nm). At this size it is very hard to see the exact structure, even with an electron microscope. We therefore don’t know for sure exactly what’s going on, however, the Fluid Mosaic Model is generally accepted as describing how membranes are arranged.
How many of the membrane proteins are intrinsic protein?
There are two major types of intrinsic proteins: those with most of their mass outside the cytoplasm (Type I) and those with most of their mass inside the cytoplasm (Type II). In the latter group are the membrane transport systems. The anion exchange system of the human erythrocyte is a dimer of band 3 polypeptides.
What is called Plasmolysis?
Plasmolysis is the process of shrinkage or contraction of the protoplasm of a plant cell as a result of loss of water from the cell. Plasmolysis is one of the results of osmosis and occurs very rarely in nature, but it happens in some extreme conditions.
Which of the following is not found in plasma membrane?
Glycolipids :Glycolipids are found on the surface of the cell membranes. … Cholesterol in plasma membrane play a role in structure and function of plasma membrane. Therefore, it has been clear from the above discussion that Lignin is not present in the cell membrane. Hence, option C is the correct answer.