Frequent question: What best describes the fluid mosaic model of the plasma membrane?

The fluid mosaic model describes the cell membrane as a tapestry of several types of molecules (phospholipids, cholesterols, and proteins) that are constantly moving. This movement helps the cell membrane maintain its role as a barrier between the inside and outside of the cell environments.

Which of the following best describes the fluid mosaic model of the 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.

Which of the following describes the fluid mosaic model of the plasma membrane structure?

Phospholipid bilayer with embedded proteins describes the fluid-mosaic model of the plasma membrane structure.

Which statement describes the fluid mosaic model?

Explanation: The fluid mosaic model is best described as a phospholipid bilayer with various molecules embedded within and floating between the layers. This is because this model talks about a phospholipid layer having protein and other molecules in it which aids in it being fluid.

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Why is the plasma membrane described as a 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. … The liquid part is the lipid bilayer which floats along the lipids due to the many types of molecules that make up the cell.

Which statement best describes the plasma membrane?

Answer Expert Verified

Plasma membrane of a living plant cell is a double lipid layer with floating protein molecules. It selectively regulates the passage of substances into the cell and out of the cell. It is also describe by the statement that the plasma membrane of a living plant cell is selectively permeable.

What is fluid mosaic model class 11?

Fluid mosaic model of cell membrane was proposed by Singer and Nicolson. According to Fluid mosaic model, the quasi-fluid nature of lipid enables lateral movement of proteins within the overall bilayer, and the ability to move within the membrane is measured as its fluidity.

Why fluid mosaic model is popularly accepted?

The lipid bilayer gives fluidity and elasticity to the membrane. Small amounts of carbohydrates are also found in the cell membrane. … The fluid mosaic model is the most acceptable model of the plasma membrane. Its main function is to separate the contents of the cell from the outside.

What part of the plasma membrane is fluid?

The hydrophilic heads of phospholipids in a membrane bilayer face outward, contacting the aqueous (watery) fluid both inside and outside the cell. Since water is a polar molecule, it readily forms electrostatic (charge-based) interactions with the phospholipid heads.

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Which of these is a function of cholesterol in a cell’s plasma membrane?

At low temperatures, however, cholesterol has the opposite effect: By interfering with interactions between fatty acid chains, cholesterol prevents membranes from freezing and maintains membrane fluidity. Although cholesterol is not present in bacteria, it is an essential component of animal cell plasma membranes.

What term best describes facilitated diffusion?

Facilitated diffusion is a protein‑facilitated movement of solutes across a membrane from an area of higher concentration to an area of lower concentration. Which of the terms best describes facilitated diffusion? passive transport.

Does the plasma membrane maintain cell shape?

The plasma membrane also plays a role in anchoring the cytoskeleton to provide shape to the cell, and in attaching to the extracellular matrix and other cells to help group cells together to form tissues. The membrane also maintains the cell potential.

What best describes facilitated diffusion?

Facilitated diffusion (also known as facilitated transport or passive-mediated transport) is the process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane via specific transmembrane integral proteins.

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