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Sanitary Microbiology Ii Question Paper

Sanitary Microbiology Ii

Course:Bachelor Of Science In Water And Environmental Engineering

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2008/2009
INSTITUTE OF OPEN LEARNING (IOL)
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN WATER
ENGINEERING
SET 525: SANITARY MICROBIOLOGY II
DATE: Thursday, 13th August, 2009 TIME: 11.00 a.m. – 1.00 p.m.
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INSTRUCTIONS:
1. This examination paper contains FIVE questions.
2. Answer any other THREE (3) questions.
Question 1
a) Briefly differentiate between a virus and a bacterium (10 marks)

b) What are the key characteristics of microbial enzymes (10 marks)

Question 2
Describe the characteristic four-phase pattern of growth displayed by bacteria in a liquid
culture (20 marks)

Question 3
a) What is eutrophication (5 marks)

b) Describe the eutrophication processes and its effects on marine ecosystems
(15 marks)

Question 4
a) Which are the main causative agents for waterborne diseases (6 marks)

b) give any two examples for each of the main groups listed in part (a) above, state
the infection, source of agent in water supply and general symptoms (14 marks)

Question 5
a) Filtration is a physical method of microbial control, briefly discuss how it
functions and give example of common uses in water supply and sanitation (10 marks)

b) Discuss the advantages of using non-chemical methods of microbial control to
chemical methods, give examples of some non-chemical methods (10 marks)