Sbt2102:General Microbiology Question Paper
Sbt2102:General Microbiology
Course:Bachelor Of Crop Protection
Institution: Meru University Of Science And Technology question papers
Exam Year:2013
QUESTION ONE – (30 MARKS)
a) Outline the four postulates by Robert Koch which help to identify the etiological cause of disease. State two cases where they do not apply. ( 6 Marks) b) Draw a schematic presentation of bacteria cell wall showing the differences between Gram negative and Gram positive bacteria ( 6 Marks) c) Define the following terms as applied in bacteriology ( 5 Marks) i) Psychrophiles ii) Mesophiles iii) Thermophiles iv) Obligate aerobes v) Obligate anaerobes d) Given a mixture of four bacteria species in a broth culture, outline two methods you would use to separate them. 10 Marks) e) Draw a well labeled bacteria growth curve of bacteria growth in a batch culture ( 3 Marks) QUESTION TWO ( 20 MARKS)
a) Describe septate and coenocytic fungal hyphae ( 5 Marks) b) Describe the characteristics that define the following ( 15 Marks) i) Zygomycetes ii) Ascomycetes iii) Basidiomycetes
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QUESTION THREE ( 20 MARKS)
a) Describe how resistance (R) genes work against plant viruses ( 5 Marks) b) List five major characteristics of viruses that distinguish them from other microorganisms ( 5 Marks) c) Describe the basic steps involved in replication of animal viruses. (10 Marks)
QUESTION FOUR ( 20 MARKS)
a) Describe the most common ingridients of culture media ( 5 Marks) b) Discuss five major types of special culture medium used to support growth of micro-organisms ( 15 Marks)
QUESTION FIVE ( 20 MARKS)
a) Compare and contrast prokaryotic and eukaryotic cell properties ( 5 Marks)
b) Discuss the economic importance of micro-organisms ( 15 Marks)
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