Cell Structure and Function

What happens to the primary wall as a plant cell matures?

• It dissolves completely
• It becomes part of the nucleus
• It transforms into the middle lamella
• A secondary wall forms inside it

What is the main polysaccharide in plant cell walls?

• Chitin
• Starch
• Glycogen
• Cellulose

What makes up the algal cell wall besides cellulose?

• Chitin and protein
• Lignin and pectin
• Phospholipids and glycoproteins
• Galactans, mannans, and calcium carbonate

What structures allow direct communication between plant cells?

• Cell membrane
• Mitochondrial pores
• Ribosomal channels
• Plasmodesmata

What component of the cell wall holds adjacent plant cells together?

• Primary wall
• Secondary wall
• Plasmodesmata
• Middle lamella