CELL WALL THE FUNDAMENTAL UNIT OF LIFE 05 Class 9th Science (Biology) (Practice Sheet) 1 What is the main function of the cell wall? A. Energy production B. Protection C. Cellular respiration D. DNA replication 2 Which of the following is NOT a component of plant cell walls? A. Cellulose B. Pectin C. Cholesterol D. Hemicellulose 3 Which layer of the cell wall serves as a connecting point between neighboring cells? A. Primary Cell Wall B. Middle Lamella C. Secondary Cell Wall D. Plasma Membrane 4 What is the primary component of the Primary Cell Wall? A. Lignin B. Cellulose C. Pectin D. Hemicellulose 5 In which type of cells can the Secondary Cell Wall be found? A. Animal cells B. Bacterial cells C. Plant cells D. Archaeal cells 6 What is the function of the middle lamella in the cell wall? 7 What are the three main layers of the cell wall? 8 How does Plasmolysis affect cells? 9 Differentiate between primary cell wall and secondary cell wall. 10 Why do animal cells lack a rigid, square shape? Page 1 Page 1 Email: Phone No: Website:
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