biochemistry old papers- jntu- 2-1 btech biotechnology - biochemistry old papers

Code No: RR212304 Set No. 1
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
BIO-CHEMISTRY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
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1. (a) What is a disaccharide ?
(b) Give two examples with structure?
(c) Discuss the role of any two disaccharides is nutritional metabolism? [3+4+9]
2. Write briefly on
(a) Dextrans
(b) Glycosaminglycans
(c) Glycosidic bond [5+5+6]
3. Describe the regulatory steps in the biosynthesis of
(a) Cholesterol
(b) Fatty acids [8+8]
4. Write short notes on
(a) Ammoina formationin biological systems.
(b) Any three specialized products of aminoacids.
(c) Zwitter ion. [5+5+6]
5. (a) What are different biosynthetic families of amino acids:- Bacteria and plant
discuss briefly.
(b) What are the processors for amino acid biosynthesis. [8+8]
6. Describe the pathways involved in:
(a) Glycogenesis
(b) Glycogenolysis [8+8]
7. Differentiate between oxygen-producing photosynthesis and bacterial photosynthe-
sis. [8+8]
8. C4 plants are typical of highly luminous environments, and may be more affected
by shade than C3 plants. Why do you think this may happen? [16]
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Code No: RR212304 Set No. 2
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
BIO-CHEMISTRY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. (a) What is a disaccharide ?
(b) Give two examples with structure?
(c) Discuss the role of any two disaccharides is nutritional metabolism? [3+4+9]
2. What is a glycosidic bond? Illustrate with structures of suitable examples [16]
3. Write notes on the following:-
(a) Very low density lipoproteins.
(b) Fatty acid break down. [8+8]
4. Give any three reactions of aminoacids and add a note on titration curves. [16]
5. Describe the pathways in the biosynthesis of aromatic amino acids. [16]
6. Schematically trace the pathways involved in the synthesis of glucose from
(a) Alanine
(b) Fatty acid [8+8]
7. What is photosynthesis? Describe the bacterial photosynthesis mechanism.[3+13]
8. What are the primary products of photosynthesis and how do other organisms use
them? [5+11]
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1 of 1
Code No: RR212304 Set No. 3
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
BIO-CHEMISTRY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. (a) What is a disaccharide ?
(b) Give two examples with structure?
(c) Discuss the role of any two disaccharides is nutritional metabolism? [3+4+9]
2. Enumerate the major storage forms of carbohydrates in plants. Illustrate the salient
features of the carbohydrates in plants. [8+8]
3. Describe the regulatory steps in the biosynthesis of
(a) Cholesterol
(b) Fatty acids [8+8]
4. Explain the role of pyruvate in nitrogen fixation. [16]
5. Describe the pathways in the biosynthesis of aromatic amino acids. [16]
6. “TCA cycle is the final common pathway of oxidation of carbohydrates, proteins
and lipids”- Substantiate the statement. [16]
7. Define the following terms: photosynthesis, light reaction, and dark reaction. [16]
8. List the inputs (raw materials) and outputs (products) of the light dependent re-
actions and the Calvin Cycle. [16]
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1 of 1
Code No: RR212304 Set No. 4
II B.Tech I Semester Supplimentary Examinations, May/Jun 2009
BIO-CHEMISTRY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. (a) Name four monosaccharides and their natural occurance in nature.
(b) Write their chemical structures.
(c) Discuss their importance in nature. [4+4+8]
2. Illustrate the branching points of glycogen and starch polysaccharides. Explain the
salient features of these polymers. [16]
3. Explain how the processes- biosynthesis and break down of fatty acids are regulated.
[16]
4. What is a peptide linkage? Describe how aminoacid sequence determines primary
structure of proteins. [3+13]
5. Describe the pathways in the biosynthesis of aromatic amino acids. [16]
6. Describe the pathways involved in:
(a) Glycogenesis
(b) Glycogenolysis [8+8]
7. Discuss the process of plant photosynthesis in detail. How is it different from the
bacterial photosynthesis? [8+8]
8. C4 plants are typical of highly luminous environments, and may be more affected
by shade than C3 plants. Why do you think this may happen? [16]
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