National Brain Research Centre 2009 Ph.D Biology - Question Paper
NATIONAL BRAIN RESEARCH CENTRE(NBRC) Ph.D model ques. Paper
NATIONAL BRAIN RESEARCH CENTRE(NBRC)
NH-8, Manesar-122050. HARYANA
Sample Questions For Ph.D. Entrance Examination-2011
Note : Sample questions are provided to give a general idea of the style of the questions that appear in the entrance test. These questions do not reflect the difficulty level of questions in the entrance test.
PHYSICS
1. Name the process or processes which alternate (s) the passage of gamma rays through matter:
(a) Photoelectric effect (b) Compton Recoils (c) Pair Production (d) All of these
2. How many quantum numbers do characterise an electron within an atom:
(a) Six (b) Five
(c) Four (d) Three
3. Write down the total number of particles inside the nucleus in terms of mass number(A) and atomic number Z:
(a) A-2Z (b) 2A-Z
(c) 3A-2Z (d) None of these
4. What is the name of the detecting device for discovery of positron:
(a) Electron Microscope (b) Geiger-Muller Counter (c) Bubble Chamber (d) Cloud Chamber
5. Give the name of the process by which a positron and an electron coalesce to form photons:
(a) Pair Annihilation (b) Compton Scattering
(c) Bremhausstrahlung (d) Rutherford Scattering
CHEMISTRY
6. When solid sodium chloride crystallises from a saturated solution, the entropy change of the system:
(a) Decreases (b) Increases
(c) Zero (d) Remains same with the surrounding
7. Pure water has a PH = 7 at 25OC. The water is heated to 90OC. Choose the right answer:
(a) Kw value will decrease and water will be alkaline
(b) Kw Value will decrease but water will remain neutral
(c) Kw Value will increase and water will be acidic
(d) Kw value will increase but water will remain neutral
8. The vapour pressure of pure components X and Y are 100 torr and 50 torr respectively at a particular temperature. Assuming solution of X & Y obeying Raoults law, the mole fraction of X in the vapour phase in equilibrium with a solution containing equimoles of X and Y is:
(a) 0.33 (b) 0.66
(c) 0.80 (d) 0.50
9. The half life time for a reaction at initial conc. of 0.1 mole/litre and 0.4 mole/litre are 200 sec and 50 sec respectively. The order of the reaction is:
(a) 0 (b) 1
(c) 2 (d) 3
10. Under equilibrium condition for the reaction 2C(s)+O2(g) 2CO(g) the total pressure is 12 atm. The value of Kp is:
(a) 16 (b) 0.5
(c) 2 (d) 32
BIOLOGY
11. The salivary gland of leech secrete the anticoagulating factor:
(a)
(c)
Hypotoxin
Hirudin
(b)
(d)
Antitoxin None of these
12. The beak is toothed in:
(a) Ostrich (c) Penguin
13. Bombykol is:
(a) A hormone (c) A pheromon
14. The major constituent of blood plasma (more than half) is:
(b)
(d)
Archaeopteryx
Kiwi
(b)
(d)
An enzyme None of these
(a) Protein
(b) Inorganic salts (d) Sugar
(b) Branching point (d) Adventitious root
(c) Fatty substance
15. Annual Ring indicates:
(a) Age of the tree (c) Scale bark
MATHEMATICS
16. If T is a real, skew-symmetric nxn matrix, then for n odd:
(a) det T > o (b) det T < o
(c) det T = o (d) None of these
17. The smallest subgroup which contains a fixed open subset of a topological group is:
(a) Only open (b) Is only closed
(c) Is both open and closed (d) All of these are false
18. A subset S of real numbers has at least one limiting point if:
(a) S is bounded (b) S is infinite set
(c) S is bounded and finite (d) S is bounded and infinite
19. Let F be a field of real numbers and ( 0 1'j e f , if D be the set of all matrices commuting
I -1 oj 2
with ( 0 1) F , then:
(a) D is isomorphic to the field of complex numbers (b) D is isomorphic to the field of real numbers (c) D is not isomorphic to the field of complex numbers (d) None of these
20. If T is a linear transformation on an inner product space V(F), then which of the following is incorrect:
(a) If T is self -adjoint, then Tr T is real (b) If T >o then Tr T >o (c) If T >o then Tr T <o (d) Not all the above are ture
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NATIONAL BRAIN RESEARCH CENTRE(NBRC)
NH-8, Manesar-122050. HARYANA
Sample Questions For Integrated Ph.D. Entrance Examination-2011
Note : Sample questions are provided to give a general idea of the style of the questions that appear in the entrance test. These questions do not reflect the difficulty level of questions in the entrance test.
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PHYSICS 1. The infrared spectrum falls between: (1) Radio waves and micro waves (3) Visible and ultraviolet regions 2. The colour of a star indicates its: (1) Weight (3) Distance |
(2) Micro waves and visible region (4) Ultraviolet and x-rays (2) Size (4) Temperature |
3.
4.
(3) r3
One star is going away from the Earth. Then the observer on the Earth will experience:
(1) Decrease in wave length (2) Increase in wave length
(3) No change in wave length (4) None of these
The terminal velocity of a spherical ball of radius r falling through a viscous liquid is proportional to:
(1) r (2) r2
(4) 1/r
5. A 200 W lamp is connected to 100 volts supply. The number of electrons passing through the
19
lamp in one minute is(charge of an electron =1.6 X 10' C):
19
(1) 1x10 (3) 7.5x10
(2)
(4)
2x10
1x10
20
CHEMISTRY
6. Which of the following type of metals are the most efficient catalysts?
(1) Alkali metal (2) Alkaline Earth metal
(3) Transition metals (4) Metals of p-block
7. The strongest bronsted base is:
(1) Clo4-(3) Clo-
(2) Cloa-(4) Clo2-
8. Mohrs salt is prepared in warm distilled water by the reaction of (NH4)2SO4 and:
(1) FeSO4 (2) Fe2(SO4)3
(3) CaSO4 (4) ZnSO4
9. Which among the following is correct order of reactivity with water according to electro chemical series:
(1) Cu>Zn>Mg>K (3) Mg>Zn>Cu>K
K>Mg>Zn>Cu
K>Zn>Mg>Cu
10. The first order rate constant for the decompostion of N2 O5 is 6.2 x 10 sec. period for the decomposition in seconds is:
(1) 1117.7 (2) 111.7
(3) 223.4 (4) 1609
(2) Carrot (4) Raddish
(2) Sugarcane (4) Gram
(2) DNA and Protein (4) DNA alone
BIOLOGY
11. Which is not a root:
(1) Potato (3) Sweet Potato
12. Stilt roots are found in:
(1) Rice (3) Groundnut
13. RIBOSOMES are made up of:
(1) RNA and DNA (3) RNA and Protein
14. Nitrogen is available for plants in the form of:
(1) Nitrogen gas (3) Nitrate
(2) Nitrogen dioxide (4) Nitric acid
(2) Nucleus into two (4) None of these
15. Karyokinesis means division of:
(1) Cytoplasm into two (3) Protoplasm into two
16. The greatest source of variations is brought about by:
(1) Mutation (2) Chromosomal aberrations
(3) Meiosis (4) Poly ploidy
17. Cell wall of bacteria is made up of:
(1) Cellulose (2) Pectin
(3) Peptidoglycon (4) Chitin
18. Which of the following is not found in Rhizopus:
(1) Sporangia (2) Rhizoids
(3) Columella (4) Setae
19. When a pollen tube enters embryo sac by piercing through integument, it is called:
(1) Mesogamy (2) Porogamy
(3) Chalazogamy (4) Pseudogamy
20. The process in which virus are involved in sexual reproduction of bacteria called:
(1) Transduction (2) Transcription
(3) Transformation (4) Translation
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21. Log tan 1O + log tan 2O + , (a) 1 , \ n (c) 7 |
+ log tan 89 =.............: (b) 0 (d) None of these |
22. If xy+yz+zx=1 then
xy =
xy
(a)
xyz (c) xyz
23. The maximum value of sin2 0+ cos4 0 is:
(a) 0
, \ 3
(c) 4
4
xyz
None of these
(b)
(d)
(b)
(d)
1
%
2
24. In a triangle ABC, the angle A is greater than angle B. If the values of the angles satisfy the
3
equation 3 sin x - 4 sin x-K=0, 0 <K<1 then the measure of angle C is:
%
2
2%
T
%
3
5 %
~6~
(a)
(c)
(b)
(d)
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Attachment: |
| Earning: Approval pending. |
