5. Mention the role/ importance of vacuoles.
6. List two similarities between mitochondria and plastids.
7. What is meant by endocytosis?
8. How do substances like carbon-dioxide and water move in and out of the cell?
9. What is the observation made when an animal cell is placed in a hypotonic solution? Why?
10. Mention any two functions of Endoplasmic Reticulum.
11. What is plasmolysis? Give one example.
12. Write two important characteristic of prokaryotic cell.
13. 'Lysosomes are a kind of waste disposal system of a cell." Justify the statement.
14. List any three differences between an animal cell and a plant cell.
15. Distinguish between diffusion and osmosis.
16. Mention the types of cell division. Write about their importance.
17. Name a membrane less cell organelle.
18. Why plasma membrane is called as a semipermeable membrane?
19. Write the full forms of DNA and ATP.
Answers
Answer:
5. Mention the role/ importance of vacuoles.
Functions of Vacuole
Vacuole is considered as the 'storage bin' of cells. Along with nucleus, vacuole is one of the important organelles of cells. ... The vacuoles help in maintaining an acidic internal pH in cells. Apart from maintaining the cell pH, vacuoles also maintain the turgor and hydrostatic pressure.
6.List two similarities between mitochondria and plastids. Solution : (i) Both are double-membrane bound organelles. (ii) Both are capaable of producing some of their own proteins due to possession of DNA, RNA, Ribosomes and enzymes.
7.Endocytosis Definition. Endocytosis is the process of actively transporting molecules into the cell by engulfing it with its membrane. Endocytosis and exocytosis are used by all cells to transport molecules that cannot pass through the membrane passively.
8.The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration. When the concentration of CO2 and water is higher in external environment than that inside the cell, CO2 and water moves inside the cell.
9.An animal cell that is placed in a hypotonic solution will rapidly gain water, because osmosis would cause the water to move to an area with more solutes. In this case, that is the inside of the cell.
Explanation: