Biochem 323-final 2005
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(B. Sc. Biochemistry) Sixth Semester 2005 Subject: Biochem 323 (Plant Biochemistry )
Full Marks: 100 Pass Marks: 45 Time: 3 hours
Candidates are required to give their answers in their own words as far as practicable. The figure in the margin indicates full marks. (3× ×14 = 42)
Group (A) Long Questions (Any three)
1. Describe the mechanism of biosynthesis of Phospholipids and glycolipids in plants. 2 What is photosynthesis? Describe the process of ATP and NADPH production during photosynthesis. 3. How does nitrogenase enzyme act in legumes and cyanobacteria? 4. Show the course of formation of phenylalanine, tyrosine and tryptophan. Enlist the enzymes involved in the course. Group (B) Short Questions: (Any six) (6× ×7 = 42) 1. Describe the mechanism for the oxidation of linolenic acid. 2. Explain the de novo biosynthesis of fatty acids in plants. 3 What reactions are involved in Calvin cycle? How is Rubisco regulated? 4 Distinguish between C3 and C4 photosynthesis. Describe CAM photosynthesis. 5 Describe NH3 synthesis and assimilation in higher plants. 6 Describe the metabolic pathways of the aspartate family amino acids. 7. How are hydroxybenzoates formed in plants? What are cyclases? Describe their roles in formation of oxygenated monoterpenoides in Mantha genus. 8 Draw structure of sterol skeleton and number of carbons as per IUPAC-IUB rules Group (C) Very Short Questions: (Any eight) 1. How can genetic manipulation be applied for enhancing cold tolerance in plants? 2. Discuss the significance of phosphatidyl glycerol. 3. What are essential fatty acids? 4. What do you mean by absorption spectrum? 5. Write short notes on photophosphorylation 6. Write short notes on fluorescence 7. What is the role of leghaemoglobin in nitrogen fixation? 8. Write short notes on aminotransferase 9. Describe the role of histamine, serotonin and acetylcholine in Urtica dioica. 10. Draw structure of lawsone and emodin. 11. What are tannins and how are they classified? 12. Write short notes on role of juglone in Juglans regia. ***
(2× ×8 = 16)
Full Marks: 100 Pass Marks: 45 Time: 3 hours
Candidates are required to give their answers in their own words as far as practicable. The figure in the margin indicates full marks. (3× ×14 = 42)
Group (A) Long Questions (Any three)
1. Describe the mechanism of biosynthesis of Phospholipids and glycolipids in plants. 2 What is photosynthesis? Describe the process of ATP and NADPH production during photosynthesis. 3. How does nitrogenase enzyme act in legumes and cyanobacteria? 4. Show the course of formation of phenylalanine, tyrosine and tryptophan. Enlist the enzymes involved in the course. Group (B) Short Questions: (Any six) (6× ×7 = 42) 1. Describe the mechanism for the oxidation of linolenic acid. 2. Explain the de novo biosynthesis of fatty acids in plants. 3 What reactions are involved in Calvin cycle? How is Rubisco regulated? 4 Distinguish between C3 and C4 photosynthesis. Describe CAM photosynthesis. 5 Describe NH3 synthesis and assimilation in higher plants. 6 Describe the metabolic pathways of the aspartate family amino acids. 7. How are hydroxybenzoates formed in plants? What are cyclases? Describe their roles in formation of oxygenated monoterpenoides in Mantha genus. 8 Draw structure of sterol skeleton and number of carbons as per IUPAC-IUB rules Group (C) Very Short Questions: (Any eight) 1. How can genetic manipulation be applied for enhancing cold tolerance in plants? 2. Discuss the significance of phosphatidyl glycerol. 3. What are essential fatty acids? 4. What do you mean by absorption spectrum? 5. Write short notes on photophosphorylation 6. Write short notes on fluorescence 7. What is the role of leghaemoglobin in nitrogen fixation? 8. Write short notes on aminotransferase 9. Describe the role of histamine, serotonin and acetylcholine in Urtica dioica. 10. Draw structure of lawsone and emodin. 11. What are tannins and how are they classified? 12. Write short notes on role of juglone in Juglans regia. ***
(2× ×8 = 16)
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