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Bota 104: General Microbiology Question Paper

Bota 104: General Microbiology

Course:Bachelor Of Science

Institution: Egerton University question papers

Exam Year:2010

ANSWER ALL QUESTIONS

1.(a) Mention any four differences between prokaryotic and eukaryotic cells. (2 Marks)
(b) Explain why viruses are not placed in any of the kingdoms of living things. (3 Marks)
(c) Outline Koch's postulates. (2 Marks)
(d) Distinguish between magnification and resolution power of a microscope. (2 Marks)
(e) What is the importance of fixing a smear before staining? (1 Mark)
2. Give the functions of the following in a typical bacterial cell. (10 Marks)
a. Capsules
b. Flagella
c. Fimbriae
d. Cell walls
e. Plasmids
3.(a) Distinguish between burst time and burst size in viral replication. (2 Marks)
(b) Distinguish between chemoheterotrophic and chemolithotrophic bacteria. (4 Marks)
(c) With aid of appropriate examples, distinguish between trace elements and
growth factors. (4 Marks)
4.(a) What is pure culture? (2 Marks)
(b) Outline the four pour-plate method of isolating pure culture of bacteria. (3 Marks)
(c) What is the principle behind streak plate method as used in microbiology. (1 Mark)
(d) In gram-staining, some cells strain purple while others stain pink? (4 Marks)
5. Based on temperature requirement, classify the microorganisms. (10 Marks)
6. Discuss the economic importance of microorganisms. (10 Marks)
7. With the aid of sketch diagrams, describe the viral replication as
exemplified by T-even bacteriophage. (10 Marks)

Bota 104: General Microbiology Question Paper

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