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Which of the following describes the given graph correctly?

Option: 1

Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme


Option: 2

Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme


Option: 3

Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme


Option: 4

Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme


Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite rod will be :

Option: 1

\frac{{\text{K}_1 + \text{K}_2 }} {2}


Option: 2

\frac{{\text{3}\left( {\text{K}_1 + \text{K}_2 } \right)}} {2}


Option: 3

K1 + K2


Option: 4

2(K1 + K2)


Hypersecretion of Growth Hormone in adults does not cause further increase in height, because:

Option: 1

Growth Hormone becomes inactive in adults.


Option: 2

Epiphyseal plates close after adolescence.


Option: 3

Bones loose their sensitivity to Growth Hormone in adults.


Option: 4

Muscle fibres do not grow in size after birth .


Select the wrong statement.

Option: 1

Bacterial cell wall is made up of peptidoglycan.


Option: 2

Pili and fimbriae are mainly involved in motility of bacterial cells.


Option: 3

Cyanobacteria lack flagellated cells.


Option: 4

Mycoplasma is a wall-less microorganism.


In the replacement reaction

The reaction will be most favorable if M happens to be:

Option: 1

K


Option: 2

Rb


Option: 3

Li


Option: 4

Na


The reaction of aqueous KMnO_4 with H_2O_2 in acidic conditions gives :

Option: 1

Mn^{4+} and\ O_2


Option: 2

Mn^{2+} and\ O_2


Option: 3

Mn^{2+} and\ O_3


Option: 4

Mn^{4+} and\ MnO_2


Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings ?

Option: 1

Thyroxin


Option: 2

Insulin


Option: 3

Adrenaline


Option: 4

Estradiol


What gases are produced in anaerobic sludge digesters?

Option: 1

Methane and CO2 only


Option: 2

Methane, Hydrogen Sulphide and CO2


Option: 3

Methane, Hydrogen Sulphide and O2


Option: 4

Hydrogen Sulphide and CO2


A wire of resistance 12 ohms per meter is bent to form a complete circle of radius 10 cm. The resistance between its two diametrically opposite points, A and B as shown in the Figure, is:

Option: 1

3 \Omega


Option: 2

6 \pi \Omega


Option: 3

6 \Omega


Option: 4

0.6 \pi\Omega


A particle starts its motion from rest under the action of a constant force. If the distance covered in first 10 seconds is S1 and that covered in the first 20 seconds is then:

Option: 1

S2 = 3S1


Option: 2

S2 = 4S1


Option: 3

S2 = S1


Option: 4

S2 = 2S1


T.O. Diener discovered a:

Option: 1

Free infectious DNA


Option: 2

Infectious protein


Option: 3

Bacteriophage


Option: 4

Free infectious RNA


A particle having a mass of 10-2 kg carries a charge of 5 x 10-8 C. The particle is given an initial horizontal velocity of 105 ms_1 in the presence of electric field \vec{\text{E}} and magnetic field \vec{\text{B}}. To keep the particle moving in a horizontal direction, it is
necessary that

(a) \vec{\text{B}} should be perpendicular to the direction of velocity and \vec{\text{E}} should be along the direction of velocity.

(b) Both \vec{\text{B}} and \vec{\text{E}} should be along the direction of velocity.

(c) Both \vec{\text{B}} and \vec{\text{E}} are mutually perpendicular and perpendicular to the direction of velocity.

(d) \vec{\text{B}} should be along the direction of velocity and \vec{\text{E}} should be perpendicular to  the direction of velocity.

Which one of the following pairs of statements is possible?

Option: 1

(a) and (c)


Option: 2

(c) and (d)


Option: 3

(b) and (c)


Option: 4

(b) and (d)


Six vectors \vec{\text{a}}, through \vec{\text{f}} have the magnitudes and directions indicated in the figure. Which of the following statements is true?

 

Option: 1

\vec{\text{b}}+\vec{\text{e}}=\vec{\text{f}}


Option: 2

\vec{\text{b}}+\vec{\text{c}}=\vec{\text{f}}


Option: 3

\vec{\text{d}}+\vec{\text{c}}=\vec{\text{f}}


Option: 4

\vec{\text{d}}+\vec{\text{e}}=\vec{\text{f}}


In which of the following pairs of molecules/ions, the central atoms have sp2 hybridization?

Option: 1

BF3 and \text{NH}_{2}^{-}


Option: 2

\text{NO}_{2}^{-} and NH3


Option: 3

BF3 and \text{NO}_{2}^{-}


Option: 4

\text{NH}_{2}^{-} and H2O


Vasa efferentia are the ductules leading from

Option: 1

Epididymis to urethra


Option: 2

Testicular lobules to rete testis


Option: 3

Rete testis to vas deferens


Option: 4

Vas deferens to epididymis


An improved variety of transgenic basmati rice

Option: 1

Give high yield but has no characteristic aroma


Option: 2

Does not require chemical fertilizers and growth hormones


Option: 3

Gives high yield and is rich in vitamin A


Option: 4

Is completely resistant to all insect pests and diseases of paddy


Force F on a particle moving in a straight line varies with distance d as shown in the figure. The work done on the particle during its displacement of 12 m is:

 

Option: 1

13 J


Option: 2

18 J


Option: 3

21 J


Option: 4

26 J


A transistor is operated in common emitter configuration at Vc = 2 V such that a change in the base current from 100 \muA to 300 \muA produces a change in the collector current from 10 mA to 20 mA. The current gain is:

Option: 1

25


Option: 2

50


Option: 3

75


Option: 4

100


Standard electrode potential for Sn4+/Sn2+ couple is +0.15 V and that for the Cr3+/Cr couple is -0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be :

Option: 1

+1.83 V


Option: 2

+1.19 V


Option: 3

+0.89 V


Option: 4

+.018 V


Which one of the following statement is not true?

Option: 1

Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant


Option: 2

pH of drinking water should be between 5.5 - 9.5


Option: 3

Concentration of DO below 6 ppm is good for the growth of fish


Option: 4

Clean water would have a BOD value of less than 5 ppm


What was the most significant trend in evolution of modern man (Homo sapiens) from his ancestors?

Option: 1

Upright posture


Option: 2

Shortening of jaws


Option: 3

Binocular vision


Option: 4

Increasing brain capacity


Select correct statement(s) : 

a) only one megaspore develop into embryosac termed as monosporic development 

b) Bisporic developement is when two megaspore mother cell develop into megaspore 

c) Tetrasporic type is when four megaspore nuclei develop into embryosac 

Option: 1

(a) only 


Option: 2

(b) only 


Option: 3

Both (a) and (c)


Option: 4

All of these 


Given below are three statements each with one or two blanks . Select the option which correctly fills up the blanks in any two statements 

A) In human beings , menstrual cycle ceases around 50 years of age ; this is termed as (i) _____

B) The milk produced during the initial few days of lactation is called  (i)_____  which contains several (ii)____ absolutely essential to develop resistance for the new-born babies 

C) At the completion of the (i)______division the primary oocyte divides into secondary oocytes and (ii)_____ 

 

Option: 1

A(i) menarche , B(i) lactation , B(ii) minerals 


Option: 2

B(i) Colostrum , B(ii) antibodies , C(i) first meiotic , C(ii) first polar body 


Option: 3

A(i) menopause , C(i) second meiotic , C(ii) second polar body 


Option: 4

A(i) menopause , B(i) Corpus lutem , B(ii) Antibodies 


Select the correct statements

Option: 1

The study of fossils is known as palaeontology

 


Option: 2

The father of palaeontology is Leonardo da Vinci


Option: 3

The primitive earth’s atmosphere was devoid of oxygen

 


Option: 4

All of these


Jumping genes are also known as 

Option: 1

Plasmid 


Option: 2

Phasemid 


Option: 3

Transposon 


Option: 4

Transferase 


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