Answer: Calcium pectate.
- A Calcium pectate
- B Cellulose
- C Lignin
- D Chitin
Correct answer: A. Calcium pectate
Explanation: The middle lamella, composed mainly of calcium pectate, holds the walls of neighbouring plant cells together.
Animal cell structure with major organelles labeled. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.