Solution of Chapter 8. Cell: The Unit of Life (Biology NCERT Book)

1 What is a mesosome in a prokaryotic cell? Mention the functions that it performs.

2 How do neutral solutes move across the plasma membrane? Can the polarmolecules also move across it in the same way? If not, then how are thesetransported across the membrane?

3 Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labeled diagrams of both.

4 What are the characteristics of prokaryotic cells.

5 Multi cellular organisms have division of labour. Explain.

6 Cell is the basic unit of life. Discuss in brief.

7 What are nuclear pores? State their function.

8 Both lysosomes and vacuoles are endo membrane structures, yet they differ in terms of their functions. Comment.

9 Describe the structure of the following with the help of labeled diagrams.(i) Nucleus                            (ii) Centrosome.

10 What is a Centromere?(i) How does the position of Centromere form the basis of classification of chromosomes?(ii) Support your answer with a diagram showing the position of Centromere on different types of chromosomes.