Cell Membrane Structure and Function

The video tutorial discusses the cell membrane, also known as the plasma membrane, highlighting its crucial role in regulating the movement of substances in and out of the cell. It explains the composition of the membrane, which includes lipoproteins, sterols, glycolipids, and the phospholipid bilayer. The phospholipid bilayer has hydrophilic heads and hydrophobic tails, making the membrane selectively permeable. The video also covers different types of permeability: permeable, semi-permeable, and impermeable. Additionally, it describes the proteins in the membrane, such as peripheral (extrinsic) and integral (intrinsic) proteins. The video concludes with a mention of further resources available on the channel.

What is the primary function of the cell membrane?

• To provide energy to the cell

• To regulate the movement of substances in and out of the cell

• To store genetic information

• To produce proteins

What are lipoproteins composed of?

• Carbohydrates and proteins

• Nucleic acids and lipids

• Vitamins and minerals

• Lipids and proteins

Which part of the phospholipid is hydrophilic?

• The entire molecule

• The middle

• The tail

• The head

What is the role of the phospholipid bilayer in the cell membrane?

• To provide structural support

• To facilitate energy production

• To store genetic material

• To create a barrier with selective permeability

What does it mean if a membrane is semi-permeable?

• It allows substances to pass through only at night

• It allows no substances to pass through

• It allows all substances to pass through

• It allows only certain substances to pass through

What is the nature of the cell membrane's permeability?

• Impermeable

• Permeable

• Non-permeable

• Selective permeable

What type of protein is found on the edge of the cell membrane?

• Transmembrane protein

• Peripheral protein

• Nuclear protein

• Integral protein

What is another name for integral proteins?

• Peripheral proteins

• Extrinsic proteins

• Surface proteins

• Transmembrane proteins

Which type of protein penetrates the cell membrane?

• Lipid-bound protein

• Surface protein

• Integral protein

• Peripheral protein

Where can you find more information about transport across the cell membrane?

• In the video tutorial

• In the textbook

• In the lab manual

• In the lecture notes