LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY, ZOOLOGY

IB 7

FOURTH SEMESTER – APRIL 2006

                                                PB 4202 – MICROBIAL BIOTECHNOLOGY

 

 

Date & Time : 22-04-2006/9.00-12.00         Dept. No.                                                       Max. : 100 Marks

 

 

Part A

Answer all the questions                                                                         (20 marks)

1. Choose the correct answer (5 x 1 = 5 )

1. ________ are enzymes which acts on proteins.

1. a) amylases b) pectinases             c) proteases     d) lipases

1. The viral surface antigen of the hepatitis B virus is .

1. a) HbsAg b) HbcAg c)  HbeAg       d)  HbdAg

1. Malt extract contains ………… % of nitrogen.

4. a) 5 b) 5.5               c) 8.5               d)  80

1. The production of malt beverages is known as …….

1. a) Malting       b) Mashing            c) Brewing      d) Ripening

1. Which of the following one is an exopolysaccharide?

1. a) Xanthan            b) Inulin          c) Renin           d) Pectin

 

1. State whether the following statements are True or False (5 x 1  = 5 )

1. An endocellular enzyme is not secreted in the fermentation medium.
2. Immunizing agents that stimulate immunity to toxins are called toxoids.
3. Microorganisms can be preserved by Lyophilization.
4. Spirulina contains carotene pigments.
5. Biosensor is used for the quantitative estimation of important substances in body fluid

III. Complete the following                                                                              (5 x 1 = 5)

1. ______ is the first discovered antibiotic.
2. _______ are used in removal of starch sizing from woven cloth.
3. The technology used for the cultivation of eukaryotic cells in large scale is called as __________
4. The moisture content of soft cheese is  ________
5. VAM  refers to ________    __________   _________.

1. Answer the following in one or two sentences. (5 x 1 = 5)

1. What is a constitutive enzyme ?.
2. What is acquired immunity ?.
3. What is Beerwort?
4. Define transgenic microbe
5. What is single cell protein?

Part B

Answer any five of the following each in about 350 words. Draw necessary diagrams.                                                                                         (5 x 8 = 40)

1. Explain the microbial production of pectinase.
2. List out any 5 applications of microbial enzymes.
3. Explain the transformation of steroids.
4. Mention the different sources of Nitrogen and Carbon energy in fermentation industry.
5. Describe the methodology of wine production. Add a note on types of wine.
6. Define Bioplastics. Write notes on  Xanthan production and its applications.
7. With the flow chart, explain the steps involved in cheese production.
8. What is biosensor? Explain its working principle and its application.

Part C

Answer the following  questions each within 1500 words. Draw necessary diagrams

(2 x 20 = 40)

29. a) i) Describe the different stages of fermentation process (10 marks)
30. ii) Describe in detail the cultivation of mushroom. Add a note on their nutritional  composition (10 marks).

OR

1. b) i) Define Biofertilizer. Explain the method of mass cultivation of Azolla and Rhizobium. Add a note on their significance (12 marks).
2. ii) Define biopesticide. Why Bacillus thuringiensis is called as biopesticide?    (8 marks)
3. a) What are antibiotics ?. What are its properties ?. Give an account on the industrial production of penicillin.

OR

1. b) Give an account on the applications of aminoacids and explain the industrial production of L glutamic acid.

 

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