Cell Structure and Function

What happens during endocytosis?

• The cell divides
• The cell expels waste
• The cell synthesizes proteins
• The cell takes in material from its environment

What is the significance of selective permeability of the plasma membrane?

• Prevents all molecules from entering
• Allows unrestricted flow of molecules
• Protects the nucleus
• Allows only certain molecules to pass through

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

• Generate energy for the cell
• Maintain cell shape
• Synthesize DNA
• Facilitate the transport of polar molecules

What structures traverse the cell wall and middle lamella?

• Cell membranes
• Mitochondrial pores
• Ribosomal channels
• Plasmodesmata

Which part of the cell wall is capable of growth?

• Middle lamella
• Secondary wall
• Cytoplasmic layer
• Primary wall