5.2 What is a Cell Made Up of? What is the Structural Organisation Cell? 5.2.1 Plasma membrane or cell membrane 5.2.2 Cell wall 5.2.3 Nucleus 5.2.4 Cytoplasm Q.5. 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, (1) Keep cup A empty (2) Put one teaspoon sugar in cup B (3) Put one teaspoon salt in cup C (4) Put one teaspoon sugar in the boiled potato cup D. Keep these for two hours. Then observe all the four potato cups and answer the following- Explain why water gathers in the hollowed portion of B and C. (i) Ans.
Answers
Answer:
1)All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates, and lipids.
2)A cell is made up of cell membrane, cell organelles and the cytoskeleton. The structural organization of the cell refers to the particular cell organelles and their function. Cells have particular structures that perform specific jobs. These cell structures are called organelles and perform the actual work of the cell
3) The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment. ... The plasma membrane consists of a lipid bilayer that is semipermeable. The plasma membrane regulates the transport of materials entering and exiting the cell
4)cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. ... The primary cell wall of land plants is composed of the polysaccharides cellulose, hemicelluloses and pectin.