Cell Biology: Organelles and Biomolecules — DU B.Sc. (Hons.) Botany Previous Year Question Papers

(iv) Trafficking through the endomembrahe system (v) Cell cycle checkpoints 4. Draw well-labelled diagrams of the following (any three) : (5x3=15) (i) Ultrastructure of Mitochondria (ii) P1.ant Cell (iii) Double helical structure of DNA (iv) Ultrastructure of Nucleus 5. (a) Give a brieftaccount on lipids. Describe in detail the major classes of storage and structural 1ipids, and their roles in living system. (8) (b) What are Intermediate filaments? Explain its structure and functions. (7) 6. (a) What do you mean by glycosylatiop. Discuss the role of Golgi apparatus in processing, packaging and sorting of proteins. (8) (b) Give a detailed account of different phases in Eukaryotic cell cycle with the help of suit.able diagram. (7) 2. Attempt four questions in all. 5. Illustrate your answer wherever possible. 1. (a) Define the following (any five) : (1x5=5) (i) Nuclear lamina (ii) Saturated fatty acids (ill) Euchromatin (iv) Peptide bond (vii) Myosin motors (b) Fill in the blanks (any five) : (1x5=5) (i) _ is the most abundant protein on earth. (ii) - is a marker enzyme for mitochondria. (i) Cytoplasmic streaming phenomenon is mediated by (iv) Endoplasmic Reticulum is a membrane bound organelle. (v) Nucleolus is a site for . - synthesis. (vi) Disulphide bonds are formed in. (vii) Mitochondria term was coined by (c) Expand the following (any five) : (1x5=5) (vii) TAG 2. Differentiate between the following (any three) : (i) Mitosis and Meiosis (ii) Primary and Secondary cell wall 3. Write short notes on the following (any three: (i) Biological significance of Hydrogen bonds. (ii) Membrane proteins and their roles (iii) Signal peptide and its role in Protein transport