Download OU B.Sc 2017 Dec 3rd Semester 7078 Biochemistry Bioenergetics, Biological oxidation and Enzymology Question Paper

Code No. 7073

FACULTY OF SCIENCE

November / December 2017

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B.Sc. (CBCS) II - Semester Examination

Subject : BIOCHEMISTRY

Paper - II

Bioenergetics Biological Oxidations and Enzymology

Time : 3 hours

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Max. Marks : 80

Part— A (5 X 4 = 20 Marks)

(Short Answer Type)

Answer any Five of the following questions.

1. Phosphate group transfer potential

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2. Exergonic and Endergonic reactions
3. Standard reduction potential of two metabolic reactions
4. F_o - F₁ - ATPase
5. Active site
6. Transition state theory

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7. Acid-Base catalysis
8. Ribozyme

Part— B (4 X 15 = 60 Marks)

(Essay Answer Type)

Answer ALL questions from the following :

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1. a) What are cytochromes and how are they classified? Discuss in detail about the structure and functions of cytochromes.
   OR
   Explain high energy compound. Add a note on energy transformation in living systems.
2. Write about various enzymes involved in biological oxidation reactions? Explain the Electron transport chain.
   OR
   

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   Discuss the ultrastructure of mitochondria. Explain in detail the theories of oxidative phosphorylation.
3. Write the nomenclature and classification of enzymes with one example for each class.
   OR
   Define holoenzyme, apoenzyme, coenzyme and co-factor. Explain the methods of enzyme purification.
4. Explain Michaelis-Menten equation for single substrate reaction. Add a note on significance of K_m and V_max.
   

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   OR
   Explain how enzyme activity is regulated. Discuss ATCase as an allosteric enzyme.