4 1.
Consider the following statements about
bioremediation
II.
It may be defined as any process that uses micro
–organisms or their enzymes to return the environment altered by contaminate to
its original condition.
III.
Bioremediation may be employed in order to
attack specific contaminants, such as chlorinated pesticides that are degraded
by bacteria.
Which of the statements given above
is / are correct?
a)
Only 1
b)
Only 2
c)
Both 1 and 2
d)
Neither 1 nor 2
42.
A transformer works with
a)
Alternating current
b)
Direct current
c)
Both ‘a’ and ‘d’
d)
Any signal
43.
With reference to ‘stem cells’ frequently in the
news, which of the following statement (s) is /are correct?
I.
Stem cells can be derived from mammals only
II.
Stem cells can be used for screening new drugs.
III.
Stem cells can be used for medical therapies.
Select the correct answer using the
codes given below
a)
1 and 2
b)
2 and 3
c)
Only 3
d)
1 , 2 and 3
44.
Most of the explosions imines occur due to the
mixing of
a)
Hydrogen with oxygen
b)
Oxygen with acetylene
c)
Methane with
air
d)
Carbon dioxide with ethane
45.
Consider the following statements.
I.
Baking soda is used in fire extinguishers
II.
Quick lime is used in the manufacture of glass.
III.
Gypsum is used in manufacture of plaster of
pairs.
Which of the statements given above
is/are correct?
a)
1 and 2
b)
2 and 2
c)
Only 1
d)
All of these
46.
The efforts to detect the existence of Higgs
boson particle have become frequent news in the recent past. What is/are the
importance / importance’s of discovering this particle?
I.
It will enable us to understand as to why
elementary particles have mass.
II.
It will enable us in the near future to develop
the technology of transferring matter from one point to another without travelling
the physical space between them.
III.
It will enable us to create better fuels for
nuclear fission.
Select the correct answer using the
codes given below
a)
Only 1
b)
2 and 3
c)
1 and 3
d)
All of these
47.
Consider the following statements
I.
Tape worm is hermaphrodite.
II.
Round – warm has separate sexes.
III.
Filarial is caused by a nematode.
IV.
Guinea – worm is an annelid.
Which of the statements given above
are correct?
a)
1 and 2
b)
1,2 and 3
c)
3 and 4
d)
2 , 3 and 4
ANSWERS
41. C
42. A
43. B
44. B
45. D
46. A
47. D