Interspecific hybridization is the mating of

Option: 1

 animals within same breed without having common ancestors


Option: 2

two different related species


Option: 3

superior males and females of different breeds


Option: 4

more closely related individuals within same breed for 4-6 generations.


Which of the following is not a characteristic feature during mitosis in somatic cells?

Option: 1

Spindle fibres


Option: 2

Disappearance of nucleolus


Option: 3

Chromosome movement


Option: 4

Synapsis


A single strand of nucleic acid tagged with a radioactive molecule is called :

Option: 1

Vector


Option: 2

Selectable marker


Option: 3

Plasmid


Option: 4

Probe


An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is :

Option: 1

Cuticle


Option: 2

Sporopollenin


Option: 3

Lignin


Option: 4

Cellulose


Which one of the following is a case of wrong matching

Option: 1

Somatic hybridization - Fusion of two diverse cells


Option: 2

Vector DNA -Site for t-RNA synthesis.


Option: 3

Micropropagation - In vitro production of plants in large numbers.


Option: 4

Callus - Unorganised mass of cell produced in tissue culture


People who have migrated from the planes to an area adjoining Rohatang Pass about six months back :

Option: 1

have more RBCs and their haemoglobin has a lower binding affinity to O2.


Option: 2

are not physically fit to play games like football.


Option: 3

suffer from altitude sickness with symptoms like nausea, fatigue, etc.


Option: 4

have the usual RBC count but their haemoglobin has very high binding affinuty to O2.


In which of the following compounds, nitrogen exhibits the highest oxidation state?

Option: 1

N_2H_4


Option: 2

NH_3


Option: 3

N_3H


Option: 4

NH_2OH


Besides paddy fields, cyanobacteria are also found inside vegetative part of:

Option: 1

Psilotum


Option: 2

Pinus


Option: 3

Cycas


Option: 4

Equisetum


The cutting of DNA at specific locations became possible with the discovery of:

 

Option: 1

Probes


Option: 2

Selectable markers


Option: 3

Ligases


Option: 4

Restriction enzymes


Ectopic pregnancies are referred to as:

Option: 1

Implantation of embryo at site other than uterus.


Option: 2

Implantation of defective embryo in the uterus


Option: 3

Pregnancies terminated due to hormonal imbalance.


Option: 4

Pregnancies with genetic abnormality.


During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:

Option: 1

Xanthophyll


Option: 2

Carotene


Option: 3

Cytochrome


Option: 4

Leghaemoglobin


An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water?

Option: 1

mv2


Option: 2

\frac{1}{2}\text{mv}^{2}


Option: 3

\frac{1}{2}\text{m}^{2}\text{v}^{2}


Option: 4

\frac{1}{2}\text{mv}^{3}


The cell junctions called tight, adhering and gap junctions are found in:

Option: 1

Connective tissue


Option: 2

Epithelial tissue


Option: 3

Neural tissue


Option: 4

Muscular tissue


Biochemical Oxygen Demand (BOD) in a river water:

Option: 1

has no relationship with concentration of oxygen in the water.


Option: 2

gives a measure of Salmonella in the water.


Option: 3

increases when sewage gets mixed with river water.


Option: 4

remains unchanged when algal bloom occurs.


Which one of the following acids is a derivative of carotenoids ?

Option: 1

Indole-3-acetic acid


Option: 2

Gibberellic acid


Option: 3

Abscisic acid


Option: 4

Indole butyric acid


Each of the two strings of length 51.6 cm and 49.1 cm are tensioned separately by 20 N force. Mass per unit length of both the strings is same and equal to 1 g/m. When both the strings vibrate simultaneously the number of beats is:

Option: 1

7


Option: 2

8


Option: 3

3


Option: 4

5


Root development is promoted by

Option: 1

Abscisic acid


Option: 2

Auxin


Option: 3

Gibberellin


Option: 4

Ethylene


The dependence of acceleration due to gravity g on the distance r from the centre of the earth, assumed to be a sphere of radius R of uniform density is as shown in figures below

 

The correct figure is

Option: 1

(4)


Option: 2

(1)


Option: 3

(2)


Option: 4

(3)


A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be (h = 6.6 x 10-34 Js)

Option: 1

\mathrm{6.6 \times 10^{-32} m}


Option: 2

\mathrm{6.6 \times 10^{-34} m}


Option: 3

\mathrm{1.0 \times 10^{-35} m}


Option: 4

\mathrm{1.0 \times 10^{-32} m}


The reaction of toluene with Cl2 in presence of FeCl3 gives X and reaction in presence of light gives 'Y'. Thus, 'X' and 'Y' are

Option: 1

X = Benzyl chloride, Y = m-chlorotoluene


Option: 2

X = Benzal chloride, Y = o-chlorotoluene


Option: 3

X = m-chlorotoluene, Y = p-chlorotoluene


Option: 4

X = o-and p-chlorotoluene, Y = Trichloromethyl benzene


Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine?

Option: 1

PCl5


Option: 2

NaOH - Br2


Option: 3

Sodalime


Option: 4

Hot conc. H2SO4


Which one of the following is not a lateral meristem?

Option: 1

Intercalary meristem


Option: 2

Intrafascicular cambium


Option: 3

Interfascicular cambium


Option: 4

Phellogen


The biomass available for consumption by the herbivores and the decomposers is called:

Option: 1

Gross primary productivity


Option: 2

Net primary productivity


Option: 3

Secondary productivity


Option: 4

Standing crop


The two gases making highest relative contribution to the greenhouse gases are

Option: 1

CO_{2}   and CH_{4}


Option: 2

CH_{4}   and N_{2}O


Option: 3

CFCs and  N_{2}O


Option: 4

CO_{2}  and N_{2}O


The correct order of increasing bond angles in the following species are:

Option: 1

OCl_2<ClO_2<ClO_2^-


Option: 2

ClO_2<Cl_2O<ClO_2^-


Option: 3

Cl_2O<ClO_2^-<ClO_2


Option: 4

ClO_2^-<Cl_2O<ClO_2


Exams
Articles
Questions