Which of the following best describes the fluid mosaic model of membrane structure?
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.
Why is the structure of a membrane described as fluid mosaic?
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. For example , there are a lot of types of proteins embedded in the membrane.
Which best describes the structure of a biological membrane?
Biological membranes consist of a double sheet (known as a bilayer) of lipid molecules. This structure is generally referred to as the phospholipid bilayer. In addition to the various types of lipids that occur in biological membranes, membrane proteins and sugars are also key components of the structure.
What happens to membrane permeability below 0?
Generally, increasing the temperature increases membrane permeability. At temperatures below 0 oC the phospholipids in the membrane don’t have much energy and so they can’t move much, which means that they’re closely packed together and the membrane is rigid.
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).
Which biomolecules can be found in the cell membrane?
Cell membranes contain a variety of biological molecules, notably lipids and proteins. Material is incorporated into the membrane, or deleted from it, by a variety of mechanisms: The cell membrane consists of three classes of amphipathic lipids: phospholipids, glycolipids, and sterols.
Why is the membrane called a phospholipid bilayer?
The structure is called a “lipid bilayer” because it is composed of two layers of fat cells organized in two sheets.
Why the surface of the plasma membrane can be described as a mosaic?
The plasma membrane of a cell is composed of numerous proteins and fats. They can be bound to each other, or be separated. The proteins and fats can also have sugar groups bound to them. … These different molecules are distributed randomly on the surface of the plasma membrane, giving it a mosaic appearance.
Which best describes the permeability of a membrane?
Permeability is the condition of being capable of having materials flow into and out of a membrane. The permeability of a cell membrane is determined by how easily a molecule can diffuse across the membrane. Usually, only molecules that are fat-soluble can permeate across a cell membrane.
Which cell organelle is called as the headquarter of cell?
Nucleus. The nucleus can be thought of as the cell’s headquarters.