Choose the incorrect statement regarding cells:
1. | Mycoplasma, the smallest cell, is only 0.3 μm in length, while bacteria could be 3 to 5 μm. |
2. | Hemoglobin-associated human cells are about 7μm in diameter. |
3. | The shape of the cell may not vary with the function they perform. |
4. | Nerve cells are longest cells. |
Choose incorrect statement
1. | Leeuwenhoek first saw and described a living cell |
2. | Robert Brown discovered cell |
3. | Electron microscope revealed all the structural details of cell |
4. | A large cell has a higher volume: surface ratio than a smaller cell |
Cell is the fundamental structural and functional unit of all living organisms because:
1. | Anything less than a complete structure of a cell does not ensure independent living. |
2. | The metabolic reactions can only occur inside a living cell. |
3. | Nucleic acids present in the cells ensure living state. |
4. | The membrane bound organelles cause differentiation for proper functioning. |
Identify the cell organelles labelled as A, B, C and D. Mark the correct option with respect to organelle and its function.
1. | A - Major site for synthesis of lipid. |
2. | B - Performs the function of packaging materials, to be delivered to only intracellular targets. |
3. | C - Sites of anaerobic respiration. |
4. | D - Main arena of cellular activities |