Exploring the Structure of Cell Membranes

The video explains the structure and function of the cell membrane, comparing it to a school entrance system. It highlights the selective permeability of the membrane, composed of a phospholipid bilayer and proteins. The phospholipid molecules have hydrophilic heads and hydrophobic tails, creating a barrier between the cell and its environment. The video concludes by noting that plant cells have an additional cell wall for structure and shape.

What is the primary function of the cell membrane?

• To provide energy to the cell

• To control what enters and leaves the cell

• To produce proteins

• To store genetic information

In the analogy of a school, what does the cell membrane represent?

• The entrance door and buzzer

• The students

• The teachers

• The classrooms

What are the two main components of the cell membrane?

• Nucleic acids and proteins

• Vitamins and minerals

• Phospholipids and proteins

• Carbohydrates and lipids

Tags

NGSS.MS-LS1-2

What is the structure of the cell membrane called?

• Protein bilayer

• Phospholipid monolayer

• Phospholipid bilayer

• Lipid-protein complex

Which part of the phospholipid molecule is hydrophilic?

• Both the head and tails

• The tails

• The head

• Neither the head nor tails

Tags

NGSS.MS-LS1-2

NGSS.MS-PS1-1

What does hydrophobic mean in the context of the cell membrane?

• Absorbs water

• Neutral to water

• Repelled by water

• Attracted to water

What is the environment inside and outside of the cell mostly composed of?

• Air

• Water

• Proteins

• Lipids

Tags

NGSS.MS-LS2-3

What additional layer do plant cells have outside of the cell membrane?

• Mitochondria

• Nucleus

• Chloroplast

• Cell wall

What is the function of the cell wall in plant cells?

• To give the plant structure and shape

• To produce energy

• To control what enters and leaves the cell

• To store genetic information

Tags

NGSS.MS-LS1-2

Where is the cell wall located in plant cells?

• Inside the cell membrane

• Outside the cell membrane

• Inside the nucleus

• Inside the mitochondria