Q26
Allen
(Conceptual Questions)
MCQ
A common biocontrol agent for the control of plant diseases caused by fungi is :-
A.
Agrobacterium
B.
Glomus
C.
Trichoderma
D.
Baculovirus
Q27
Allen
(Conceptual Questions)
MCQ
Which one of the following microbes forms symbiotic association with plants and helps them in their nutrition?
A.
Glomus
B.
Trichoderma
C.
Azotobacter
D.
Aspergillus
Q28
Allen
(Conceptual Questions)
MCQ
Lactic acid bacteria (LAB) grow in milk and convert it to curd and also improve its nutritional quality by increasing :-
A.
Vitamin A
B.
Vitamin $\mathsf{B}_{12}$
C.
Vitamin $\mathsf{B}_6$
D.
Vitamin C and A
Q29
Allen
(Conceptual Questions)
MCQ
The puffed-up appearance of dough is due to:-
A.
Growth of LAB
B.
Production of $O_{2}$ and ethanol
C.
Production of $CO_{2}$
D.
Growth of yeast Monascus
Q30
Allen
(Conceptual Questions)
MCQ
Select the correct match :-
A.
Aspergillus niger - Acetic acid
B.
Streptokinase - Immunosuppressive
C.
Cyclosporin - A - Clot buster
D.
Statins - Blood Cholesterol lowering agent
Q31
Allen
(Conceptual Questions)
MCQ
Biogas is the mixture of gases produced by the microbial activity. The type of the gas produced depends upon:ā
A.
type of microbes
B.
type of organic substrate / waste
C.
size of digester
D.
Both (1) and (2)
Q32
Allen
(Conceptual Questions)
MCQ
Which biocontrol agent in very common in root ecosystem & is effective against several plant pathogens?
A.
Baculoviruses
B.
Trichoderma
C.
Nucleopolyhedro virus
D.
Ladybird beetle & Dragonflies
Q33
Allen
(Conceptual Questions)
MCQ
Which of the following bacterium is associated with production of bioinsecticide?
A.
Bacillus subtilis
B.
Bacillus thuringiensis
C.
Agrobacterium
D.
Azotobacter
Q34
Allen
(Conceptual Questions)
MCQ
Biopesticide include :-
A.
Only bioinsecticide
B.
Only bioherbicide
C.
Bioinsecticide & bioherbicide
D.
Bioherbicide, bioinsecticide & biofertilisers
Q35
Allen
(Conceptual Questions)
MCQ
Bacillus thuringiensis is used to control :-
A.
Moth
B.
Flies
C.
Mosquito
D.
All the above BMH035
Q36
Allen
(Conceptual Questions)
MCQ
Trichoderma has proved a useful micro-organism for :-
A.
Gene transfer in higher plants
B.
Biological control of soil-borne plant pathogens
C.
Bioremediation of contaminated soils
D.
reclamation of wastelands
Q37
Allen
(Conceptual Questions)
MCQ
Microbial insecticide is :-
A.
Bacillus polymyxa
B.
Bacillus brevis
C.
Bacillus subtilis
D.
Bacillus thuringiensis
Q38
Allen
(Conceptual Questions)
MCQ
Ladybird is useful to get rid of:-
A.
Aphids
B.
Mosquitoes
C.
Boll worm
D.
Jassids
Q39
Allen
(Conceptual Questions)
MCQ
The domestic sewage in large cities: -
A.
is processed by aerobic and then anaerobic bacteria in the primary treatment in sewage treatment plants
B.
when treated in sewage treatment plants does not really require the aerobic step as the sewage contains adequate oxygen
C.
has very high amounts of suspended solids and dissolved salts.
D.
has a low BOD as it contains both aerobic and anearobic bacteria
Q40
Allen
(Conceptual Questions)
MCQ
What is B.O.D.?
A.
The amount of $O_{2}$ utilised by organisms in water
B.
The amount of $O_{2}$ utilized by micro-organisms for decomposition
C.
The total amount of $O_{2}$ present in water
D.
All of the above
Q41
Allen
(Conceptual Questions)
MCQ
BOD stands for :-
A.
Biological organism death
B.
Biochemical organic matter decay
C.
Biotic oxidation demand
D.
Biochemical oxygen demand
Q42
Allen
(Conceptual Questions)
MCQ
Polluted water can be purified by using :-
A.
Micro-organisms
B.
Algae
C.
Pesticides
D.
Fishes
Q43
Allen
(Conceptual Questions)
MCQ
When huge amount of sewage is dumped into a river, the BOD will?
A.
Increase
B.
Remain unchanged
C.
Slightly decrease
D.
Highly decrease
Q44
Allen
(Conceptual Questions)
MCQ
A lake with an inflow of domestic sewage rich in organic waste may result in :-
A.
Drying of the lake very soon due to algal bloom
B.
An increase production of fish due to lot of nutrients
C.
Death of fish due to lack of oxygen
D.
Increased population of aquatic food web organisms
Q45
Allen
(Conceptual Questions)
MCQ
In the treatment of waste water discharge, which treatment stage involves biological treatment :-
A.
Primary treatment
B.
Secondary treatment
C.
Tertiary treatment
D.
Reverse osmosis stage
Q46
Allen
(Conceptual Questions)
MCQ
The major source of BOD in the river Ganga is
A.
Leaf litter
B.
Fishes
C.
Human waste
D.
Aquatic plants
Q47
Allen
(Conceptual Questions)
MCQ
Assertion (A) : Currently large number of biofertilizers are available commercially in the market and farmers use these biofertilizers in their field to replenish soil nutrients.
Reason (R) : Use of biofertilizers can reduce dependence on chemical fertilizers and so as environmental pollution.
A.
Both A and R are true and R is the correct explanation of A
B.
Both A and R are true but R is NOT the correct explanation of A
C.
A is true but R is false
D.
A is false but R is true
Q48
Allen
(Conceptual Questions)
MCQ
B.O.D. is connected with :-
A.
Organic matter
B.
Microbes
C.
Both
D.
None
Q49
Allen
(Conceptual Questions)
MCQ
Read the given statements and select the correct option.
Statement A: Ministry of Environment and Forest has initiated Ganga Action Plan.
Statement B: Effluent from secondary treatment cannot be released into water bodies.
A.
Only A is correct
B.
Only B is correct
C.
Both A & B are correct
D.
Both A & B are incorrect
Q50
Allen
(Conceptual Questions)
MCQ
Assertion : Bottled fruit juice brought from market are clearer as compared to those made at home.
Reason : Bottled juice possess pectinases and proteases.
A.
Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B.
Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C.
Assertion is True but the Reason is False.
D.
Both Assertion & Reason are False.