Thapar University 2007 M.Sc BioTechnology Agricultural & Industrial Microbiology - Question Paper
(Department of (Biotechnofogy and EnvironmentaCSciences M.Sc. Biotechnology BH 010: Food Biotechnology
Time : 3 h M.M. 72
All questions carry equal marks. Attempt any six questions. Answer all parts of one question at one place.
1 a Differentiate between the dry and wet process of maize milling. Explain the wet milling 6
process.
b Write the principles and mechanism involved during high-pressure processing and pulsed 4 electric field application for food preservation,
c Write short notes on: Clarification of milk, and 2
Regeneration during pasteurization
2 a What is HACCP? Write about its implementation in food industry. 4 b Describe the bread baking process. 4
c Draw the detailed flowchart for manufacture of soya protein isolate. 2
d Enlist the antinutritional factors in pulses. 2
3 a Explain beer preparation. In which steps modem biotechnology has helped in improving the 6
process or overcoming the problems?
b Give a brief introduction of the freezers used in food industry. 5
c What is the importance and use of lipoxygenase in food industry? 1
4 a What is the controlled atmosphere packing of fruits and vegetables? Describe the ways to 5
achieve it.
b Explain the cleaning equipment used for food plant sanitation. 4
c Explain rancidity of oils. Name three antioxidants. 3
5 a Which criteria are kept in mind for food plant layout and machine design regarding sanitation? 6 b What is the effect of irradiation on food components? Is irradiated food safe for human 6
consumption? Discuss.
r
a Give a detailed procedure for calculation of thermal processing time. 5
b Describe the process for ice cream manufacture. 4
c Microbial cell cultures are immensely useful for production of food ingredients, processing aids 3 and nutrients? Elaborate.
7 a Give reasons for loss in quality on freezing and dehydration of foods. 6
b How is wheat milling different from rice milling. Give brief description of both the processes. 6
All the best!!
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