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Environmental Biochemistry I Question Paper

Environmental Biochemistry I

Course:Bachelor Of Science In Environmental Health

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
SECOND SEMESTER EXAMINATIONS 2008/2009
UNIVERSITY EXAMINATIONS FOR DEGREE OF BACHELOR OF SCIENCE
(ENVIRONMENTAL HEALTH)

HEH 201: ENVIRONMENTAL BIOCHEMISTRY I

DATE: Thursday 2nd April 2009
TIME: 11.00am-1.00pm

INSTRUCTIONS:
Answer all questions in section A and any 3 questions in section B, Question 6 is section
B is compulsory.

Section A: Answer all questions in this section

1.
State four differences between catabolism and anabolism.
[4marks]

2.
Outline any four (4) structural differences between DNA and RNA.

[4marks]

3.
Explain how human interference with nitrogen cycle is harmful to the

environment.

[4marks]

4.
Name any four oligosaccharides and state their reducing sugar properties.

[4 marks]

5.
Outline four agents of protein denaturation.

[4marks]

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Section B: Answer any three questions, Q6 is compulsory

6.
With specific examples, describe the classification of enzymes based on enzyme
commission
system
of
nomenclature.
[11marks]

b)
Explain any three types of reversible enzyme inhibitors.
[9marks]

7.
Describe the processes affecting the cycling and retention of phosphorous in the

wetlands.

[11marks]

b)
Outline the role of any four types of bacteria involved in the nitrogen
cycle.

[4marks]

8.
Citing examples, discuss the role of biochemistry in environmental maintenance
and pollution control.

[15marks]

9.
With structural examples, describe types of stereoisomerisms exhibited by
monosaccharides.
[15marks]

10.
Compare and contrast between respiration and fermentations reactions.

[10marks]

a)
Explain the importance of fermentation reactions in food industry.

[5marks]

11.
Explain mechanism of controlling metabolic activities in living cells.

[15marks]

Page 2 of 2

Environmental Biochemistry I Question Paper

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