LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION - FOOD CHEMISTRY & FOOD PROCESSING
FIRST SEMESTER – APRIL 2012
FP 1801 - ORGANIC CHEMISTRY OF FOOD - I
Date : 27-04-2012
Time : 9:00 - 12:00
Dept. No.
Max. : 100 Marks
Part A
Answer all the questions:
2x10 =20
1. Give the structures of sucrose and maltose. Where are they found in food?
2. What is gelatinization?
3. Give the classification of carbohydrates with suitable examples.
4. What are antioxidants? Give an example.
5. Mention four uses of Dietary fiber.
6. What happens when amino acid reacts with Ninhydrin ?
7. Define lipolysis.
8. Draw the lock and key theory of enzymes.
9. Give the classification of vitamins with suitable examples.
10. Define enzyme cofactors?
Part B
Answer any eight questions:
8x5=40
11. Explain carrageenans.
12. What is Xanthan? Write its uses in food industry.
13. Write briefly about lactose – intolerance.
14. Explain the modification of fats
15. Write short notes on aligns.
16. How will you evaluate the nutritive value of protein by PER method?
17. Explain on alkylation of protein in food.
18. Write short notes on the classification of lipids.
19. Define enzymes and write short notes on the enzymes that bring about color modification in
food.
20. What are the four main factors that influence the enzyme activity?
21. Write the various steps involved in the photochemical conversion of Riboflavin.
22. Briefly write about the classification of enzymes.
Part C
Answer any four questions:
23. Give a detailed account on the factors influencing the rate of lipid oxidation in food
24. Discuss in detail the primary and secondary structure of proteins
25. What is Gum Arabic? Give in detail the sources and application in food industries
26. “Gel is partially elastic solid and partially liquid” justify .
27. a) What are enzyme inhibitors?
b) Discuss in detail about the various kinds of enzyme inhibition.
28. a) Draw the structure of Vitamin A and beta carotene
b) Give a detailed account about the stability and mode of degradation of Vitamin A
4x 10=40