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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.
1. निम्नलिखित प्रत्येक का एक महत्वपूर्ण कार्य लिखिए:
i) F1 कण
ii) साइटोक्रोम b
iii) प्लैज़मोडैस्मेटा
iv) माइलिन आच्छद
v) थाम्बोसाइट
2. निम्नलिखितयुग्मों के बीच अन्तर लिखिए:
i) आयन विनिमय और बंधुता वर्णलेखन
ii) m-आर. एन. ए. और t-आर. एन. ए.
iii) सूक्ष्मनलिकाएँ और सूक्ष्मतंतु
iv) फेगोसाइटोसिस तथा अस्थिशोषक
3. निम्नलिखित पर सक्षिप्त टिप्पणियां लिखिए:
i) ऑटोरेडियोग्राफी
ii) प्लैज्मा झिल्ली की संरचना
iii) अर्धसूत्री विभाजन |
iv) कोशिका में CAMP द्वितीय दूत के रूप में
4. निम्नलिखित के स्वच्छ सुनामांकित चित्र बनाइएः
i) एक मोटर न्यूरॉन
ii) डी.एन.ए. का वाटसन एवं क्रिक मॉडल
5. कोशिका में पाए जाने वाले प्रमुख वृहदाणुओं के नाम बताइए। वृहदाणुओं के अणुभार में अन्तर के आधार पर उनको पृथक करने की किन्हीं दो विधियों का वर्णन कीजिए ।
6. क) जंतुओं में द्रव्य संयोजी ऊतक के घटकों का वर्णन कीजिए।
ख) विभाज्योतक क्या है? पादपों में इसकी भूमिका की विवेचना कीजिए ।
7. क) एंजाइम गतिकी की व्याख्या कीजिए।
ख) ओपरॉन मॉडल की सहायता से एंजाइम क्रिया के आनुवंशिक नियंत्रण पर चर्चा कीजिए ।
8. क) केन्द्रीय आवरण की संरचना तथा प्रकार्य का वर्णन कीजिए।
ख) प्रोकैरिऑटों में पॉलीपेप्टाइड श्रृंखला के संश्लेषण का उपक्रम किस प्रकार होता है ?
9. माइटोकॉन्ड्रिया, क्लोरोप्लास्ट तथा जिवाणुओं के इलेक्ट्रान अंतरण द्वारा प्रोटोन प्रवणता (ग्रेडियन्ट ) के निर्माण का वर्णन कीजिए।
10. वर्णन कीजिए कि किस प्रकार ग्लाइकोलाइसिस तथा टी. सी. ए. (TCA) चक्र परस्पर जुड़े रहते हैं।
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