What best describe the structure of a cell membrane?

What best describe the structure of a cell membrane?

The cell membrane is a fluid matrix made of a phospholipid bilayer. The hydrophobic parts of the molecules on the bilayer face each other, whereas the hydrophilic parts form the inner and outer surfaces of the cell membrane. Small, hydrophobic molecules can traverse the cell membrane via simple diffusion.

What term describes the structure of a cell membrane?

The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable.

Which of the following best describes cell membrane?

The correct answer is (C) A flexible lipid double layer. The cell membrane is often referred to as a “fluid mosaic,” a flexible structure…

How do you describe the structure of a cell?

A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.

What is the structure of a cell membrane and its function?

Structure of Plasma Membranes The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

What is the structure of the membrane?

The fundamental structure of the membrane is the phospholipid bilayer, which forms a stable barrier between two aqueous compartments. In the case of the plasma membrane, these compartments are the inside and the outside of the cell.

What two words are used to describe the cell membrane?

The cell membrane is also called the plasma membrane or the plasmalemma.

Which of the following describes the composition or structure of the cell membrane?

Which of the following describes the composition of cell membranes? Cell membranes are composed of carbohydrate chains, which allow all materials to enter & leave the cell. Cell membranes are composed of cellulose, which provide rigidity for the cell.

Why is cell membrane called permeable?

The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.

What are the structural components of a cell membrane?

The principal components of a plasma membrane are lipids (phospholipids and cholesterol), proteins, and carbohydrates attached to some of the lipids and some of the proteins. A phospholipid is a molecule consisting of glycerol, two fatty acids, and a phosphate-linked head group.

What is a characteristic of cell membranes?

Cell membranes serve as barriers and gatekeepers. They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot. Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly.

What are the three functions of a cell membrane?

Three functions that are directly controlled by the cell membrane are recognition of chemical messages, protection, and active transport. 0.0.

What composes the cell membrane of a cell?

Cell membranes are composed primarily of fatty-acid-based lipids and proteins . Membrane lipids are principally of two types, phospholipids and sterols (generally cholesterol).

What is the basic unit of a cell membrane?

A double layer — a bilayer — of lipid molecules forms the basic unit from which cell membranes are constructed. The lipids in the cell membrane are a special type of lipid called. phospholipid. They have a phosphate head and a lipid tail region.

What are the characteristics of a cell membrane?

The cell membrane or plasma membrane is a biological and thin semi-permeable membrane that surrounds the cytoplasm of a cell. Membranes are sheet like structures and they form closed boundaries between compartments of different composition. Membrane consists of lipids and proteins.