Question

Cell theory is not applicable for:

• A. Bacteria
• B. Fungus
• C. Algae
• D. Virus

Answer 1

The correct option is D

Virus

The correct option is D:

Explanation of the correct option:

1. All plants and animals are made up of cells.
2. Cells are the structural and functional unit of life.
3. All cells arise from pre-existing cells.
4. Viruses lack protoplasm.
5. They cannot reproduce and make more cells.
6. Thus, they are not true cells.
7. So, cell theory is not applicable for viruses.'

Explanation of the incorrect option(s):

Option A:

1. Bacteria are made up of cells.
2. They give rise to new cells.
3. The structural and functional unit of life in bacteria is the bacterial cells.
4. So, cell theory is applicable to bacteria.

Option B:

1. Fungus gives rise to new cells.
2. Cells form the structure and are responsible for all the functions taking place in a fungus.
3. So, cell theory is applicable to fungus.

Option C:

1. Algae can be unicellular or multicellular.
2. Their cells give rise to new cells.
3. It forms the structure of algae and performs various functions as well.
4. So, cell theory is applicable to algae.

Final answer: Cell theory is not applicable for viruses.