MICROBIOLOGY AND MICROBIAL BIOTECHNOLOGY MODEL QUESTION PAPERS

MODEL QUESTION PAPERS
C.B.C.S.S B.Sc BOTANY & BIOTECHNOLOGY ( Double Main)
MICROBIOLOGY AND MICROBIAL BIOTECHNOLOGY
SECTION A
Answer all questions
Weight one for each bunch of 4 questions

1. Triple vaccine for the prevention of viral infection protects against _________ ________ and _____________
2. State True /False. Mac Conkey agar prevents the growth of gram negative bacteria.
3. Give 2 examples of DNA virus.
4. Resolution of Electron Microscopy is __________
5. Give one example for photosynthetic bacteria.
6. Give the composition of Agar.
7. Give 2 examples for selective and differential media,
8. The condition where microbes are temporarily unable to grow, at least under laboratory conditions are

     called __________
9. During pasteurization milk is heated to ______________degree Celsius for _________minutes.
10. The phase in which primary products of metabolism are produced is known as __________ phase.
11. Give two examples of primary metabolites.
12. Name any two culture collection centers.
13. Name the fermenter which can be used for continous culture.
14. Chemical nucleus of penicillin is _________________
15. Give example for a mixotrophic bacteria.
16. The mode of horizontal gene transfer mediated by viruses is known as __________

SECTION B
Answer any Five only
Carries weight of one each

17. Describe Air lift Fermenter.
18. Define Microbial inhibition spectrum
19. What are antifoam ? Give any four properties for an ideal antifoam.
20. Define Lysogeny Lysogen , Temperate Phages , Virulent Phages.
21. Define Growth. Describe the four phases of growth curve in a closed culture system.

22. Define sterilization. Give the various methods of physical and chemical sterilization.
23. Describe the principle of Phase contrast microscopy.
24. What are Koch’s postulate.

SECTION C
Answer any four
Carries weight of 2 each

25.Calculate the mean growth rate and generation time of a culture that increases in exponential

      phase from 5x 10² to lx 10⁸ in 12 hours.
26.Discuss the culturing of viruses in laboratory.
27.Describe Screening with reference to a suitable example.
28.Define fermentation. Give 2 microbial enzymes and their role in industrial process.
29.Differentjate between gram positive and gram negative bacteria.
30.Describe briefly the classification of culture media with examples.

SECTION D
Answer any two
Carries weight of 4 each

31. Describe in detail the production of Industrial Ethanol.
32. Discuss the ways in which micro organism are classified based on their  requirements for

       energy, carbon, and electron with examples.
33. Describe lytic and lysogenic viral reproduction cycles. With suitable diagrams.