I sem B.Sc. Examination, Nov/Dec 2008 (Semester Scheme) BIOCHEMISTRY - I Time : 3 Hours Max. Marks : 60 Instruction : Answer any six questions from Part - A and any eight questions from Part - B . PART - A Answer any six of the following : ( 2x6=12 ) 1. Define Electron affinity. 2. What factors do the following prefixes indicate ? a) micro b)nano c)picod d)milli 3. What are reversible cells ? 4. What are polar and non-polar molecules ? 5. Define surface tension. 6. Give an example for natural and artificial semi-permeable membrane. 7. Write all the possible values of l and m when n=3. 8. Define half life period of a radioactive element. 9. Define: Number average molecular weight of a polymer. 10. Calculate the oxidation number of Mn in KMnO4.