CELL BIOLOGY Question Papers (REGULAR,2007)

SET-1

1. What are the three tenets of cell theory? What are the natural factors that govern the size and shape of the cells?
2. Justify the statement “plasma membrane acts as a semi-permeable membrane in libing cells”
3. Cite the one unique function in of each of the following: plasma membrane, nucleus, nuclear envelope, mitochondrion, chloroplast, RER, SER, Golgi complex, secretory complex, lysosome, peroxisomes, ribosomes, cytoskeleton, microtubules, microfilaments, intermediate filaments, extra cellular matrix, cell wall.
4. Briefly explain how glucose is transported across plasma membrane of a cell
5. What is the cell cycle? What are the stages of the cell cycle? How does the cell cycle vary among different types of cells?
6. With respect to cell cycle differentiation write notes on:

(a) Cytoplasmic determinants

(b) Nucleoplasmic interactions

7. Explain G-protein coupled receptors
8. Explain the role of protein tyrosine kinase in cell growth and differentiation.

SET-2

1. Explain the characteristics of a living cell
2. Describe the properties of the three classes of membrane proteins and how they differ from one another and how they vary among themselves.
3. Cite the one unique function in of each of the following: plasma membrane, nucleus, nuclear envelope, mitochondrion, chloroplast, RER, SER, Golgi complex, secretory complex, lysosome, peroxisomes, ribosomes, cytoskeleton, microtubules, microfilaments, intermediate filaments, extra cellular matrix, cell wall.
4. Write a note on ATP powered pumps in detail
5. Justify the statement “There are variations observed in cell cycle patterns of some cells”
6. What is meant by stem cell differentiation
7. Briefly explain the different classes of cell cycle receptors
8. With respect to secondary messengers, write short notes:

(a) c AMP

(b) c GMP

SET-3

1. Write short notes on

(a) Cell theory

(b) Discovery of cells

2. Describe the 3 functions of microtubules and microfilaments. Compare and contrast microtubule assembly and intermediate filament assembly
3. Discuss each of the following

(a) the structure and role of the cell membrane

(b) the structure and role of the mitochondria

4. How the substances moved across the plasma membrane against its concentration gradient?
5. Justify the statement “There are variations observed in cell cycle patterns of some cells”
6. Explain what is meant by cell differentiation
7. Citing a suitable example explain nuclear receptors
8. Explain the role of protein tyrosine kinase in cell growth and differentiation.

SET-4

1. With a neat-labeled diagram explain the structure of a typical eukaryotic cell

2. What property allows carbon compounds to exist in a number of forms and what properties of a carbon atom are critical to life.

3. What are the major functions of nucleus? How are the nuclear pores important in protein trafficking?

4. Elaborately explain the role of symportes and antiporters as transport proteins in co-transport of substances across plasma membrane

5. Describe the following- Cell Cycle; cell plate; centrioles; centromere; sister chromatids; spindle fibers

6. Using a Haemopoietic system explain stem cell differentiation

7. What do receptors accomplish for a cell? Explain.

8. Using a suitable example discuss the role of secondary messengers in signal transduction.