Download PTU B.Tech 2021 Jan BT-Biotechnology 3rd Sem 76947 Microbiology Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January BT-Biotechnology 3rd Sem 76947 Microbiology Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (BT) (2018 Batch) (Sem.?3)
MICROBIOLOGY
Subject Code : BTBT-303-18
M.Code : 76947
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Write briefly :
1.
Prions
2.
Flagella
3.
Conjugation
4.
Endospore and exospore
5.
Peptidoglycan
6.
Active transport
7.
Molasses
8.
Extremophiles
9.
Agar agar
10. Mesosomes
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SECTION-B
11. Differentiate between the cell wall of Gram positive and Gram negative bacteria? Explain
with suitable examples.
12. Explain various techniques used for isolating pure culture from mixed culture? What are
selective media and differential media?
13. What are autotrophs and what are their different physical and chemical growth
requirements for culturing? Explain with suitable examples and give various sources of
nutrients.
14. Discuss and explain bacterial recombination in detail? What are its applications?
15. Define microbial growth? What are different methods to determine growth in unicellular
and multicellular micro-organisms? Explain with examples.
SECTION-C
16. What physical and chemical methods are used to control the growth of microbes? Why
their control is necessary?
17. What is strain improvement and why it is necessary? How it can be achieved?
18. Explain different methods for preservation of micro-organisms? What are germplasm
banks and why preservation of microbes is necessary?
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.
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