Download PTU B.Sc-Agriculture 2020 March 1st Sem 72210 Biochemistry Question Paper

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Roll No. [T TTTTTT] [ ] Total No. of Pages : 02
Total No. of Questions : 09

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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1. Define :
   1. What are the distinct features of a plant cell?
   2. Name any four standard amino acids with three- and single-letter codes.
   3. “All enzymes are not proteins.” Justify the statement.
   4. Define apoenzyme and holoenzyme with examples.
   5. Give a brief account of purines and pyrimidines.

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   6. List some common fatty acids found in living organisms.
   7. State briefly the biological importance of ATP and dATP.
   8. Write only the principle of oxidative phosphorylation.
   9. Write a brief note on gluconeogenesis.
   10. What are phenolics? Clarify with examples.

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SECTION-B

2. Give a list of fat-soluble vitamins, and state briefly their biological importance.
3. Discuss critically the major factors that influence enzyme activity.
4. State the means of calculating standard free energy change (AG’°) of reactions.

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5. Elaborate the steps of palmitic acid oxidation in living organism.
6. Give a brief and comprehensive account of starch biosynthesis.

SECTION-C

7. Illustrate primary, secondary, tertiary and quaternary structures of proteins.
8. Write precise notes on pentose phosphate pathway and amino acid degradation.

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9. Elucidate hormonal control of the metabolic pathways in animals.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.