Cell Membrane Structure and Function

The video explores the cell membrane's role in maintaining a distinct internal environment. It covers the structure and function of phospholipids, the fluid mosaic model, and the roles of integral and peripheral proteins. The video also explains selective permeability, protein channels, and pumps, and the functions of glycoproteins and glycolipids in cell recognition and adhesion.

What is the primary function of the cell membrane?

• To provide energy to the cell

• To produce proteins

• To maintain a distinct internal environment

• To store genetic information

Which part of the phospholipid is hydrophilic?

• Phosphate head

• Fatty acid tail

• Neither tail nor head

• Both tail and head

How do phospholipids behave when submerged in water?

• They repel each other

• They dissolve completely

• They form a solid structure

• They self-organize into bilayers

What does the 'mosaic' in the fluid mosaic model refer to?

• The rigid structure of the membrane

• The random arrangement of lipids

• The uniform distribution of proteins

• The assembly of various molecules forming a pattern

What is the significance of the fluid nature of the cell membrane?

• It makes the membrane impermeable

• It enables lateral movement of proteins and lipids

• It prevents any movement of molecules

• It allows the membrane to be rigid

What is the role of integral proteins in the cell membrane?

• They provide structural support only

• They act as a barrier to all substances

• They store energy for the cell

• They assist in selective permeability

Which type of transport do protein channels facilitate?

• Active transport

• Passive transport

• Endocytosis

• Exocytosis

What is a key function of glycoproteins in the cell membrane?

• Energy production

• Cell recognition

• Protein synthesis

• DNA replication

How do glycoproteins contribute to cell adhesion?

• By breaking down lipids

• By forming tight junctions

• By transporting ions

• By storing carbohydrates

What is the role of glycolipids in the cell membrane?

• To transport proteins

• To assist in cell signaling

• To act as enzymes

• To provide energy