Fill in the gaps in the following table illustrating differences between prokaryotic and eukaryotic cells.
| Prokaryotic Cell | Eukaryotic Cell |
|
1. Size: Generally small (1-10 \( \mu\)m); 1 \( \mu\)m = \( 10^{-6}m\) |
1. Size: Generally large (5-100 \( \mu\)m) |
|
2. Nuclear region: ____________________ ___________________________________ and known as _______ |
2. Nuclear region: well defined and surrounded by a nuclear membrane. |
| 3. Chromosome: single | 3. More than one chromosome. |
| 4. Membrane-bound cell organelles absent. |
4. _______________________ |
| Prokaryotic Cell | Eukaryotic Cell |
|
1. Size: Generally small (1-10 μm) 1 μm = \( 10^{-6}\)m 2. The nuclear region is poorly defined due to the absence of a nuclear membrane and known as the nucleoid. 3. There is a single chromosome. 4. Membrane-bound cell organelles absent. |
1. Size: Generally large (5-100 μm) 2. Nuclear region: well defined and surrounded by a nuclear membrane. 3. There are more than one chromosomes. 4. Membrane-bound cell organelles present. |
Which type of cell division is required for growth and repair of body and which type is involved in formation of gametes?
Carry out the following osmosis experiment:
Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Put each potato cup in a trough containing water. Now,
(a) Keep cup A empty
(b) Put one teaspoon sugar in cup B
(c) Put one teaspoon salt in cup C
(d) Put one teaspoon sugar in the boiled potato cup D.
Keep these for two hours. Then observe the four potato cups and answer the following:
(i) Explain why water gathers in the hollowed portion of B and C.
(ii) Why is potato A necessary for this experiment?
(iii) Explain why water does not gather in the hollowed out portions of A and D.
Where do the lipids and proteins constituting the cell membrane get synthesised?