Make a comparison and write down ways in which plant cells are different from animal cells?
Difference between the plant cell and the animal cell are:
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Plant Cell |
Animal Cell |
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1. The outermost covering of the plant cell is the cell wall which is formed of cellulose. 2. Plastids (e.g., chloroplast) present. 3. Large vacuole present. 4. Centrioles are absent but polar caps are present. 5. Golgi apparatus is in the form of sub-units, called dictyosomes. |
1. The outermost covering is the plasma membrane. 2. Plastids absent. 3. Small or no vacoules are present. 4. Centrioles are present within centrosome. 5. Prominent and highly complex Golgi apparatus is present near nucleus. |
What would happen if the plasma membrane ruptures or breaks down?
The plasma membrane provides shape and support to the cell. It is a selectively permeable membrane and keeps a check on the movement of substances in and out of the cell by the process of diffusion or osmosis. Thus, if the plasma membrane is ruptured it cell contents will be in direct contact with the enviroment and movement of substances will no longer be selective. Free movement may lead to the death of the cell.
How is a prokaryotic cell different from a eukaryotic cell?
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Prokaryotic Cell |
Eukaryotic Cell |
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1. Cell size is generally small (1-10 μm) 2. Nucleus is not bounded by a membrane and it is called nucleoid. 3. Only a single chromosome is present. 4. Nucleolus is absent. 5. Membrane bound cell organelles are absent. 6. Cell division by fission or budding (no mitosis). |
1. Cell is generally large (5-100 (μm) 2. Nuclear material is surrounded by a nuclear membrane. 3. More than one chromosome are present. 4. Nucleolus is present. 5. Cell organelles bounded by membrane are present. 6. Cell division mitotic or meiotic. |
Which organelle is known as the powerhouse of the cell? Why?
Mitochondria are known as ‘Power House’ of the cell.They are called so because they produce energy in the form of ATP molecules. ATP is the energy currency of the cell. It is stored and used for making new compounds and mechanical work.
What would happen to the life of a cell if there was no Golgi apparatus?
Golgi apparatus perform the function of storage, packaging and dispatch of substances synthesised by endoplasmic reticulum. It transports the material in and out of the cell. It is also reponsible for the formation of lysosomes. Therefore, if there were no golgi bodies then there would be no storage, packaging and transport of material. The formation of lysosomes will not take place in the absence of Golgi apparatus. All this will lead ultimately to the death of Golgi apparatus.
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