Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because

Option: 1

there is a negative pressure in the lungs


Option: 2

there is negative intrapleural pressure pulling at the lung walls


Option: 3

there is a positive intrapleural pressure


Option: 4

pressure in the lungs is higher than the atmospheric pressure


A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of 2.0 rad s-2. Its net acceleration in ms-2 at the end of 2.0 s is approximately:

Option: 1

8.0


Option: 2

7.0


Option: 3

6.0


Option: 4

3.0


The product formed by the reaction of an aldehyde with a primary amine is

Option: 1

Schiff base


Option: 2

Ketone


Option: 3

Carboxylic acid


Option: 4

Aromatic acid


The amino acid Tryptophan is the precursor for the synthesis of :

Option: 1

Melatonin and Serotonin


Option: 2

Thyroxine and Triiodothyronine


Option: 3

Estrogen and Progesterone


Option: 4

Cortisol and Cortisone


Spliceosomes are not found in cells of :

Option: 1

Plants


Option: 2

Fungi


Option: 3

Animals


Option: 4

Bacteria


Plants which produce characterstic pneumatophores and show vivipary belong to :

Option: 1

Mesophytes


Option: 2

Halophytes


Option: 3

Psammophytes


Option: 4

Hydrophytes


A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the energy stored in the capacitor is:

Option: 1

\frac{1}{2}\varepsilon _{0}E^{2}


Option: 2

E^{2} Ad/\varepsilon _{0}


Option: 3

\frac{1}{2}\varepsilon _{0}E^{2}Ad


Option: 4

\varepsilon _{0}E^{2}Ad


Select the correct statement from the following regarding cell membrane.

Option: 1

Na+ and K+ ions move across cell membrane by passive transport


Option: 2

Proteins make up 60 to 70% of the cell membrane.


Option: 3

Lipids are arranged in a bilayer with polar heads towards the inner part.


Option: 4

Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.


The radical,    is aromatic because it has:

Option: 1

6 p-orbitals and 7 unpaired electrons


Option: 2

6 p-orbitals and 6 unpaired electrons


Option: 3

7 p-orbitals and 6 unpaired electrons


Option: 4

7 p-orbitals and 7 unpaired electrons


Which of the following lanthanoid ions is diamagnetic?

(At no.s. Ce = 58, Sm = 62, Eu = 63, Yb = 70)

Option: 1

Yb2+


Option: 2

Ce2+


Option: 3

Sm2+


Option: 4

Eu2+


The order of stability of the following tautomeric compounds is:

Option: 1

II > III > I


Option: 2

I > II > III


Option: 3

III > II > I


Option: 4

II > I > III


Which vector can clone only small fragment of DNA?

Option: 1

Bacterial artificial chromosome


Option: 2

Yeast artificial chromosome


Option: 3

Plasmid


Option: 4

Cosmid


Which one of the following is wrong about chara?

Option: 1

Uper oogonium and lower round antheridium 


Option: 2

Globule and nucule present on the same plant 


Option: 3

Upper antheridium and lower oogonium 


Option: 4

Globule is male reproductive structure 


Which body of the Government of India regulates GM research and safety of introducing GM organisms for public services ?

Option: 1

Genetic Engineering Approval Committee


Option: 2

Research Committee on Genetic Manipulation


Option: 3

Bio - safety committee


Option: 4

Indian Council of Agricultural Research


In a Rutherford scattering experiment when a projectile of charge z1 and mass M1 approaches a target nucleus of charge z2 and mass M2, the distance of closest approach is r0. The energy of the projectile is:

Option: 1

directly proportional to z1 z2


Option: 2

inversely proportional to z1


Option: 3

directly proportional to mass M1


Option: 4

directly proportional to mass M1  M2


Semiconservative replication of DNA was first demonstrated in:

Option: 1

Escherichia coli


Option: 2

Streptococcus pneumoniae


Option: 3

Salmonella typhimurium


Option: 4

Drosophila melanogaster


Point mutation involves:

Option: 1

Change in single base pair


Option: 2

Duplication


Option: 3

Deletion


Option: 4

Insertion


Which of the following reactions is an example of nucleophilic susbtitution reaction?

Option: 1

2 RX + 2Na\longrightarrow R - R + 2 NaX


Option: 2

RX + H2\longrightarrowRH + HX


Option: 3

RX + Mg\longrightarrow RMgX


Option: 4

RX + KOH\longrightarrow ROH + KX


Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?

Option: 1

3d54s1


Option: 2

3d54s2


Option: 3

3d24s2


Option: 4

3d34s2


The straight chain polymer is formed by:

Option: 1

hydrolysis of CH3 SiCl3 followed by condensation polymerisation


Option: 2

hydrolysis of (CH3)4 Si by addition polymerisation


Option: 3

hydrolysis of (CH3)2 SiCl2 followed by condensation polymerisation


Option: 4

hydrolysis of (CH3)3 SiCl followed by condensation polymerisation


Assume each reaction is carried out in open container. For which reaction will \Delta H=\Delta E?

Option: 1

C_{\left ( s \right )}+2H_{2}O_{\left ( g \right )}\rightarrow 2H_{2}O_{\left ( g \right )}+CO_{2}_{\left ( g \right )}


Option: 2

PCl_{5\left ( g \right )}\rightarrow PCl_{3\left ( g \right )}+Cl_{2\left ( g \right )}


Option: 3

2CO_{\left ( g \right )}+O_{2\left ( g \right )}\rightarrow 2CO_{2\left ( g \right )}


Option: 4

H_{2\left ( g \right )}+Br_{2\left ( g \right )}\rightarrow 2HBr_{\left ( g \right )}


The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it.The resulting daughter is an 

Option: 1

isomer of parent


Option: 2

isotone of parent


Option: 3

isotope of parent


Option: 4

isobar of parent


Transport of food material in higher plants takes place through

Option: 1

Companion cells


Option: 2

Transfusion tissue


Option: 3

Tracheids


Option: 4

Sieve elements


A solid cylinder and a hollow cylinder, both of the same mass and same external diameters are released from the same height at the same time on an inclined plane. Both roll down without slipping. Which one will reach the bottom first?

Option: 1

Both together only when angle of inclination of plane is 45°


Option: 2

Both together


Option: 3

Hollow cylinder


Option: 4

Solid cylinder


A particle has initial velocity \left ( 3\vec{\text{i}}+4\vec{\text{j}} \right ) and has acceleration \left ( 0.4\vec{\text{i}}+0.3\vec{\text{j}} \right ). Its speed after 10 s is

Option: 1

10 units


Option: 2

7 units


Option: 3

7\sqrt{2}   units


Option: 4

8.5 units


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