IV. Question - Answer
1. Write down three basic characteristics of a cell.
2. What do you mean by unicellular and
multicellular ?
3. What is division of labour? Explain it in context
of multicelluear organisms.
4. Why does viruses form a exception to cell
theory?
5. Name the largest plant cell.
6. Define the following terms: cell, prokaryotic cell
,
eukaryotic cell, organelle.
7. Briefly describe the structure and functions of cell
wall.
8. Describe the structure and functions of nucleus.
9. What are diploid and haploid number?
10. Describe structure of a chromosome.
11. Describe structure and functions of plasma
membrane.
12. What do you mean by passive and active
transport ? Write a note on diffusion.
13. Describe the mechanism of osmosis. Give its
importance.
14. Write a note on plasmolysis.
15. What is endoplasmic reticulum? Give its types
and functions.
16. Describe structure and functions of Golgi
apparatus.
17. What are lysosomes ? How are they formed ?
Give their functions.
18. Discuss the structure and functions of
mitochondria.
19. With the help of a labelled diagram describe the
structure of a chloroplast.
Answers
Answer:
I will answer for 2 nd question
2:-Unicellular are those organs which have a single cell like amoeba.
Multicellular are those organs which have many cells like human.
Answer:
1. The 3 basic character of cell that:
•All known living things are made up if 1 or more cells. •The cell is the vasic structural and functional unit of all living things.
•All cells arise from pre existing cells by division.
2. Unicellular organisms:- are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function.
Multicellular organisms:- are composed of more than one cell, with groups of cells differentiating to take on specialized functions.
3. Division of labour, the separation of a work process into a number of tasks, with each task performed by a separate person or group of persons. It is most often applied to systems of mass production and is one of the basic organizing principles of the assembly line.