biochemistry-jntu-btechbiotechnology-jntuold question papers

Code No: R05212301 Set No. 4
II B.Tech I Semester Supplimentary Examinations, November 2008
BIO CHEMISTRY
(Bio-Technology)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
⋆ ⋆ ⋆ ⋆ ⋆
1. Write short Notes:
(a) Homopolysaccharides
(b) Heteropolysaccharides
(c) Formation of Maltose
(d) Some Common Disaccharides. [4+4+4+4]
2. Explain the relationship between Glyoxylate and citric acid cycle. [16]
3. What do you understand by “redox” reactin? Write a note on oxidation versus
reduction in the biological system. [16]
4. Describe the amino acid residues in proteins are L stereo isomers. [16]
5. What is the key intermediate in the synthesis of aromatic amino acids? Sketch the
biosynthesis of tryptophan from chorismate, how it is regulated? [16]
6. (a) What are ceramides and sphingolipids? Give their structural features and
mention their biological roles.
(b) What are glycosphingolipids and cerebrosides. Mention their structural fea-
tures. [8+8]
7. Enumerate the dierent stages involved in the extraction of energy from food stus.
Outline the major pathways involved in this process. [16]
8. What is the mechanism of trapping the solar energy? What are the primary and sec-
ondary photoreceptor molecules? Explain the structural characteristics of chloro-
phylls. [16]