TNPSC
Exam-GROUP – II - Subject wise analysed questions and Answers- Science-Part-3
51. Sulphide ores are concentrated by
A) hand picking
B) magnetic
separation
C) gravity
separation
D) forth
floatation
Ans : (D)
52. Pyrolusite in the mineral of
A) Mendelevium B) Molybdenum
C) Magnesium D) Manganese
Ans : (d)
53. An enhanced beam of monochromatic and
coherent light is called
A) MASER B) LASER
C) TESTER D) MASTER
Ans : (B)
54. The oxidant used in the testing of alcohol
in breath is
A) MnO2 B) KMnO4
C) K2Cr2O7 D) KNO3
Ans : (C)
55. The net resistance of a voltmeter should
be large to ensure that
A) It does not get overheated
B) It does
not draw excessive current
C) It can
measure large potential differences
D) It does
not change the potential difference to be measured
Ans : (B)
56. Consider the following statements:
I. Glucagon increases the blood sugar
level
II. Glucagon
lower the blood calcium level
Of these
A) I and II
are correct
B) I and II
are wrong
C) I is
correct but II is wrong
D) I is wrong
but II is correct
Ans : (C)
57. Balbiani rings are found in
A) Sex chromosomes
B) Allosomes
C) Autosomes
D) Polytene
chromosomes
Ans : (D)
58. What is the respirator pigment found in
human RBC?
A) Haemoglobin B) Hemeythrin
C) Haemocyanin D) Chlorocruorin
Ans : (A)
59. Who first reported the presence of
respiratory centre which maintains and controls
the rate of respiration?
A) Mislavsky B) Collip
C) Bayliss D) Starling
Ans : (C)
60. Double helical model of DNA was
discovered by
A) Watson and Crick
B) James and
Meselon
C) Jacob and
Monad
D) Wilkins
and Levene
Ans : (A)
61. Which one of the following is not an
output device?
A) Speaker B) Computer monitor
C) CD D) Laser printer
Ans : (C)
62. Passage of waste product in the renal
tubule is an example of
A) Diffusion B) Osmosis
C) Active
transport D) Passive transport
Ans : (A)
63. Organisms which eat other organisms are
called
A) Consumers B) Producers
C) Decomposer D) Saprophytes
Ans : (A)
64. MS - DOS is the name of
A) A device
B) An
application software
C) An
operating system
D) hardware
Ans : (C)
TNPSC
GROUP – II
Science
– April 2010
65. Positron was discovered by
A)
Ruther ford B) Dirac
C) Madam Curie D) Chadwick
Ans : (B)
66. Floppy disk is a /an
A)
storage device B) input device
C) output device D) input – output device
Ans : (D)
67. Hydrogen bomb is based on the principle
of
A)
nuclear explosion B) nuclear fusion
C) nuclear fission D) slow
reaction
Ans : (B)
68. A source program is the program written
in language
A)
English B) Symbolic
C) High level D) Machine
Ans : (C)
69. Conversion of information to data will be
in the forms of
A)
integers
B) rounded to 2 decimals
C) fractions
D) any of these
Ans : (D)
70. The unit of capacitance is
A)
Coulomb B) farad
C) ohm D) gram
Ans : (B)
71. A collection of related data, that is,
having a similar purpose is called as
A)
database B) record
C) structure D) all
of these
Ans : (A)
72. The organism used by T.H. Morgan to study
mutation was
A)
Chlorella B) Drosophila
C) Yeast D) Neurospora
Ans : (B)
73. Which of the following acts as biological
control organism against glycotoxin producing soil pathogens?
A)
Trichoderma virens
B) Aspergillus niger
C) Pencillium notatum
D) Chaetomium globosum
Ans : (A)
74. Which of the following has the smallest
flower?
A)
Wolffia microsscopic B) Canna
indica
C) Azadircta indicaq D) Pyrus malus
Ans : (A)
75. The host cells in human physiological
system for HIV causing AIDS are
A)
T1 lymphocyte B) T2 lymphocyte
C) T3 lymphocyte D) T4
lymphocyte
Ans : (D)
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