Understanding Cells: Structure and Function

The video introduces cells as the basic units of life, explaining their components: cell membrane, cytoplasm, and nucleus. It discusses the specialization of cells for different functions and compares animal and plant cells, highlighting unique plant cell features like vacuoles, cell walls, and chloroplasts. The video also covers diffusion, explaining how substances move across cell membranes.

What is the primary function of the cell membrane?

• To provide structural support

• To store genetic information

• To control what enters and exits the cell

• To produce energy for the cell

Which component of the cell is responsible for controlling its activities?

• Nucleus

• Cell membrane

• Mitochondria

• Cytoplasm

Why do different cells have different appearances?

• They have different sizes

• They are located in different parts of the body

• They perform different functions

• They are made of different materials

What is a unique feature of plant cells not found in animal cells?

• Nucleus

• Cell membrane

• Cytoplasm

• Chloroplasts

What is the role of chlorophyll in plant cells?

• To protect the cell

• To enable photosynthesis

• To provide structural support

• To store water

What is the primary role of the vacuole in plant cells?

• To maintain cell shape

• To provide energy

• To protect the cell

• To store nutrients

What process allows substances to move across the cell membrane?

• Endocytosis

• Active transport

• Diffusion

• Osmosis

Which substances can easily pass through the cell membrane?

• Lipids and fats

• DNA and RNA

• Proteins and starch

• Oxygen and glucose

What is the main difference between diffusion and osmosis?

• Osmosis requires energy, diffusion does not

• Osmosis involves water, diffusion does not

• Diffusion requires energy, osmosis does not

• Diffusion involves water, osmosis does not

How do cells maintain their organization?

• By constantly changing shape

• By merging with other cells

• By being highly organized

• By floating freely