Question

Cell theory states I. All living cells must have a cell wall.
II. All living cells require glucose for survival.
III. The basic unit of life is a cell.

• A. III only
• B. I and II
• C. Only I
• D. None of these

Hint:

The cell is the smallest unit capable of carrying out all vital life processes.

Answer 1

The Correct Option is A

Step 1: Cell theory states that all living organisms are composed of cells, and the cell is the basic structural and functional unit of life.
Step 2: Statement I is incorrect because animal cells do not have a cell wall.
Step 3: Statement II is incorrect because not all living cells directly require glucose; some organisms use other sources of energy or synthesize glucose themselves.
Step 4: Statement III correctly represents a fundamental principle of cell theory. Therefore, only statement III is correct.