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Heh Environmental Biochemistry Ii Question Paper

Heh Environmental Biochemistry Ii

Course:Bachelor Of Science In Environmental Health

Institution: Kenyatta University question papers

Exam Year:2009

DATE: Thursday 10th September, 2009 TIME: 8.00 a.m. – 10.00 a.m.
SECTION I – (20 MARKS)
Answer ALL questions.
1.
Explain the following concepts:

i.
Bioreactors

[5 marks]
ii.
Mycoremediation
[5
marks]
iii.
Bioremediation [5
marks]
iv.
Bioaugmentation
[5
marks]

SECTION II – (50 MARKS)
This has TWO parts. Answer ALL questions in Part I and any 2 in part II.
PART I – (20 MARKS)
2.
a)
Discuss the importance of biotransformation. [9
marks]

b)
Using examples describe the following reactions in biotransformation
i)
Oxidation
[4
marks]
ii)
Glucuronide
conjugation
[4
marks]
iii)
Hydrolysis
[3
marks]

PART II – (30 MARKS)
3.
a)
Discuss the concept of biomonitors.

[10 marks]
b)
Describe the two types of phytoextraction and give four examples of this
process.

[5 marks]
4.
Describe phytotransformation, its advantages and disadvantages. [15 marks]
5.
a)
Depending on the nature of the community and the industry and the
projected uses of the waters of the receiving water courses various waste
constituents may have to be removed before discharge. Discuss.

[9 marks]
b)
Describe how the following contaminants are removed during the
treatment of industrial waste water:

i)
Solids

[2 marks]
ii)
Oils
and
grease [4
marks]

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