Chapter 5 : The fundamental unit of life
Q. Make a comparison and write down ways in which plant cells are different from animal cells.
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Q. What would happen to the life of a cell if there was no Golgi apparatus?
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Q. Which organelle is known as the powerhouse of the cell? Why?
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Q. Where do the lipids and proteins constituting the cell membrane get synthesised?
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Q. 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.
(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.
(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.
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Q. What is osmosis?
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Q. What would happen if the plasma membrane ruptures or breaks down?
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Q. How does an Amoeba obtain its food?
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