Interspecific hybridization is the mating of
animals within same breed without having common ancestors
two different related species
superior males and females of different breeds
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?
Spindle fibres
Disappearance of nucleolus
Chromosome movement
Synapsis
A single strand of nucleic acid tagged with a radioactive molecule is called :
Vector
Selectable marker
Plasmid
Probe
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is :
Cuticle
Sporopollenin
Lignin
Cellulose
Which one of the following is a case of wrong matching
Somatic hybridization - Fusion of two diverse cells
Vector DNA -Site for t-RNA synthesis.
Micropropagation - In vitro production of plants in large numbers.
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 :
have more RBCs and their haemoglobin has a lower binding affinity to O2.
are not physically fit to play games like football.
suffer from altitude sickness with symptoms like nausea, fatigue, etc.
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?
Besides paddy fields, cyanobacteria are also found inside vegetative part of:
Psilotum
Pinus
Cycas
Equisetum
The cutting of DNA at specific locations became possible with the discovery of:
Probes
Selectable markers
Ligases
Restriction enzymes
Ectopic pregnancies are referred to as:
Implantation of embryo at site other than uterus.
Implantation of defective embryo in the uterus
Pregnancies terminated due to hormonal imbalance.
Pregnancies with genetic abnormality.
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by:
Xanthophyll
Carotene
Cytochrome
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?
mv2
The cell junctions called tight, adhering and gap junctions are found in:
Connective tissue
Epithelial tissue
Neural tissue
Muscular tissue
Biochemical Oxygen Demand (BOD) in a river water:
has no relationship with concentration of oxygen in the water.
gives a measure of Salmonella in the water.
increases when sewage gets mixed with river water.
remains unchanged when algal bloom occurs.
Which one of the following acids is a derivative of carotenoids ?
Indole-3-acetic acid
Gibberellic acid
Abscisic acid
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:
7
8
3
5
Root development is promoted by
Abscisic acid
Auxin
Gibberellin
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
(4)
(1)
(2)
(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)
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
X = Benzyl chloride, Y = m-chlorotoluene
X = Benzal chloride, Y = o-chlorotoluene
X = m-chlorotoluene, Y = p-chlorotoluene
X = o-and p-chlorotoluene, Y = Trichloromethyl benzene
Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine?
PCl5
NaOH - Br2
Sodalime
Hot conc. H2SO4
Which one of the following is not a lateral meristem?
Intercalary meristem
Intrafascicular cambium
Interfascicular cambium
Phellogen
The biomass available for consumption by the herbivores and the decomposers is called:
Gross primary productivity
Net primary productivity
Secondary productivity
Standing crop
The two gases making highest relative contribution to the greenhouse gases are
and
and
and
and
The correct order of increasing bond angles in the following species are: