Question

Which of the following statements is not a part of the cell theory?

• A. All living beings are made up of one or more cells.
• B. All cells arise by division of pre-existing cells.
• C. Cells are the basic structural and functional units of life.
• D. All cells are surrounded by cell wall.

Answer 1

The correct option is D All cells are surrounded by cell wall.

Schleiden, Schwann and Virchow contributed to the formation of cell theory. It states that:

• All living beings are made up of one or more cells.
• Cells are the basic structural and functional units of life.
• All cells are similar in their chemical composition and metabolic processes.
• All cells arise by division of pre existing cells.

All cells do not possess cell wall. For example, animal cells are not surrounded by cell wall.