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This particular Assignment references the syllabus chosen for the subject of Life Science, for the January 2024 - December 2024 session. The code for the assignment is LSE-01 and it is often used by students who are enrolled in the B.Sc. Degree.
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1. State one important function of each of the following:
i) F1 particles
ii) cytochrome b
iii) Plasmodesmata
iv) Myelin sheath
v) Thrombocytes
2. Differentiate between the following pairs:
i) Ion exchange and Affinity chromatography
ii) m-RNA and t-RNA
iii) Microtubules and Microfilaments
iv) Phagocytosis and Pinocytosis
3. Write short notes on any of the following:
i) Autoradiography
ii) Structure of plasma membrane
iii) Meiosis I
iv) cAMP as second messenger in cell
4. Draw neat and well labelled diagrams of the following:
i) A motor neuron
ii) Watson and Crick model of DNA
5. Name the major macromolecules present in the cell. Describe any two methods of separating macromolecules on the basis of differences in their molecular weight.
6. a) Describe the components of fluid connective tissue in animals.
b) What is meristem? Discuss its role in plants.
7. a) Explain enzyme kinetics
b) Discuss the genetic control of enzyme activity with the help of operon model.
8. a) Describe the structure and function of nuclear envelope
b) How is polypeptide chain synthesis initiated in prokaryotes?
9. Describe the formation of proton gradient caused by electron transfer in mitochondira, chloroplasts and bacteria.
10. Describe how glycolysis and TCA cycle are linked to each other.
1. Write short notes on the following:
(i) Autoradiography
(ii) Gluconeogenesis
(iii) Cytokinesis
(iv) Phagocytosis
2. (a) Describe the structure of Golgi apparatus with the help of a well labelled diagram. List some of its important functions.
(b) Explain how protein synthesis in prokaryotes different from that in eukaryotes.
3. Differentiate between following pair of terms:
(i) Endocytosis and Exocytosis
(ii) Microtubules and microfilaments
(iii) DNA and RNA iv) Cilia and Flagella
4. (a) Describe the technique of column chromatography.
(b) Explain the structure of nerve cell with the help of a well labelled diagram.
5. Explain in detail the tricarboxylic acid (TCA) cycle with the help of a well labelled diagram.
6. (a) Describe various phases of cell cycle.
(b) Protein synthesis is regulated at various levels. Justify the statement giving a suitable explanation.
7. (a) Describe the molecular organization of cell membrane.
(b) Explain in brief the chemiosmotic theory.
8. (a) Describe the structure and function of tRNA.
(b) Describe double helix model of DNA.
9. Explain various stages of mitotic division with the help of suitable diagrams.
10. (a) What are allosteric enzymes? Describe their mechanism of action.
(b) Describe bacterial chemotaxis.
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