Cell Structure and Function Concepts

The video tutorial explains the structure and function of the cell's nucleus, cytoplasm, and cell membrane. The nucleus acts as the control center, housing DNA and directing cellular activities. The cytoplasm is a complex solution where many chemical reactions occur, and it facilitates the movement of materials within the cell. The cell membrane serves as a protective barrier, regulating the entry and exit of substances through its selectively permeable structure composed of phospholipids and proteins.

What is the primary function of the nucleus in a cell?

• To provide energy

• To control cell activities

• To transport nutrients

• To store waste

What is the role of the nuclear membrane?

• To control access to DNA

• To produce proteins

• To generate energy

• To store lipids

What happens to chromatin during cell division?

• It becomes liquid

• It exits the cell

• It dissolves

• It forms chromosomes

What is the cytoplasm primarily composed of?

• Only proteins

• Water, proteins, carbohydrates, and lipids

• Only carbohydrates

• Only water

What is the function of cytoplasmic streaming?

• To produce energy

• To move materials within the cell

• To store waste

• To divide the cell

What is the main function of the cell membrane?

• To generate energy

• To regulate substance entry and exit

• To store genetic information

• To produce proteins

What is the structure of a phospholipid molecule?

• Hydrophilic head and hydrophobic tail

• Hydrophobic head and hydrophilic tail

• Only hydrophilic

• Only hydrophobic

How does the cell membrane act as a gatekeeper?

• By generating proteins

• By storing waste

• By selectively allowing substances to pass

• By producing energy

What role do proteins in the cell membrane play?

• They store lipids

• They store genetic information

• They transport molecules across the membrane

• They produce energy

What is the composition of the cell membrane?

• Only carbohydrates

• Only proteins

• Only lipids

• Phospholipids and proteins