Some Important Questions and Samples Written by me

1. Environmental Biotechnology Samples
©
Ali Safaa97
1-Assimilation vs Dissimilation
2-Biomethylation definition
3-Three treatment process of sewage with brief explanation
4-MLSS definition
5-wastes treated with Tricking filter
6-organic matter consisting of what?
7-autotrophic vs heterotrophic bacteria
8-ingestion definition
9-sources of Nitrogen?
10-reductive vs Desaturative Deamination ammonification?
11-organisms catalyzing nitrification?
12-sulphate reducing vs sulphide oxidizing bacteria?
13-define Facultative ponds?
14-monooxygenase enzymes
15- ‫ﻣ‬
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16-polymerization vs Accumulation
17-Aliphatic easier than aromatic degradation
18-equation of hydrogenation of alkenes
19-equation of decarboxylation of fatty acids
20-equation of Methylation
21-Disadvantages of anaerobic process of biodegradation
22-characteristic of microorganisms that participate in the
bioremediation
23-compare between aerobic and anaerobic bioremediation?
24-Methyltrophs definition
25-Augmentation definition
26-In the anaerobic bioremediation there is an increasing interest in

2. PCB and TCE
27-pesticides must be specific to work
28-list five antibiotics produced by BCAs?
29-list three lytic enzymes
An/ chitinase, chitosan, cellulase etc...
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1-Examples of aerobic bacteria recognized for their degradative
abilities:-
An/ Pseudomonas, Alicaligenes, sphingomonas, Rhodococcus,
Mycobacterium
2-Similarly aliphatic hydrocarbons are also attacked with oxygen as a
reactant. The oxygen is inserted into the:-
An/ End or sub terminal carbon chain by a monooxygenase
3-Bioventing involves supplying:-
An/ Air and Nutrients
4-Composting definition
5-A slurry bioreactor create three phases:-
An/ solid, liquid, gas
6-Bioremediation is highly sensitive to:-
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7-Bacteria initiate the oxidation of aromatics by incorporating both
atoms of molecular oxygen into aromatic ring to produce a:-
An/ Cis-dihydrodiol which is then dehydrogenated to give:- Catechol
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1-Nitrogen, phosphorus and toxic elements like metals and pathogens

3. are removed
2-Q*BOD/ V*MLSS Y
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3-aggregates of non-living organic polymers that are secreted by
bacteria
4-one or more enzymes of the pathways involved in anabolism or
catabolism and all three processes of ingestion, growth and respiration
will be inhibited
5-Nitrosomonas, Nitrosospira, Nitrosovibrio, Nitrococcus, Thiosphaera,
Arthrobacter, Flavobacterium
6- 100:20:6 while in industrial are more variable in composition such as
pulp and paper industries are deficient in nitrogen and phosphorus
7-mixed liquor is continuously transferred to clarifier for gravity
separation of the biological floc and discharge of the clarified effluent
8-maximum growth rate
9- 0.04 g/ 5 g of bacteria
10-pseudomonas, escherichia, bacillus, denitriobacillus, micrococcus
denitryficans, spirillum
11-depletion of oxygen, foul smell due to generation of H2S, death to
non resistant organisms, some dead algae release toxins in water that
deplete oxygen level
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Q1/ what is the difference between and give example if available
1-Biodegradation and Biotransformation
2-Bio-stimulation and Bio-augmentation
3-in situ and ex situ bioremediation techniques
4-Land farming and compost process
5-Dioxygenase and monoxygenase enzymes
6-Methylotrophs and methanogenic bacteria?
7-Terminal and sub terminal oxidation of aliphatic hydrocarbons

4. 8-Cis and Trans dihydrodiol of monoaromatic compounds
9-Aerobic and Anaerobic degradation
10-Monoculture and polyculture
11-Aliphatic and Aromatic compounds
12-Bioventing and Biosparging
13-Biopesticides and chemical pesticides
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