Which of the following is incorrect for windpollinated plants? (1) Pollen grains are light and non-sticky (2) Well exposed stamens and stigma (3) Many ovules in each ovary (4) Flowers are small and not brightly coloured
In a mixture, DNA fragments are separated by (1) Polymerase chain reaction (2) Bioprocess engineering (3) Restriction digestion (4) Electrophoresis
Large, empty colourless cells of the adaxial epidermis along the veins of grass leaves are (1) Bulliform cells (2) Lenticels (3) Guard cells (4) Bundle sheath cells
Match the following techniques or instruments with their usage: (a) Bioreactor (i) Separation of DNA fragments (b) Electrophoresis (ii) Production of large quantities of products (c) PCR (iii) Detection of pathogen, based on antigen-antibody reaction (d) ...
The biosynthesis of ribosomal RNA occurs in: (1) Nucleolus (2) Ribosomes (3) Golgi apparatus (4) Microbodies
The half-life for a zero order reaction having 0.02 M initial concentration of reactant is 100 s. The rate constant (in mol L–1 s–1) for the reaction is (1) 1.0 × 10–2 (2) 1.0 × 10–4 (3) 2.0 × 10–4 (4) 2.0 × 10–3
Identify the incorrect statement from the following : (1) The overall decrease in atomic and ionic radii from lanthanum to lutetium is called lanthanoid contraction (2) Zirconium and Hafnium have identical radii of 160 pm and 159 pm, respectively as a ...
Identify compound (A) in the following reaction: (1) Benzoic acid (2) Benzoyl chloride (3) Toluene (4) Acetophenone
If 8 g of a non-electrolyte solute is dissolved in 114 g of n-octane to reduce its vapour pressure to 80%, the molar mass (in g mol–1) of the solute is [Given that molar mass of n-octane is 114 g mol–1] (1) 20 (2) 40 (3) 60 (4) 80
Two solid conductors are made up of same material, have same length and same resistance. One of them has a circular cross section of area A1 and the other one has a square cross section of area A2. The ratio A1/A2 is (1) 2 (2) 1.5 (3) 1 (4) 0.8
A n-p-n transistor is connected in common emitter configuration (see figure) in which collector voltage drop across load resistance (800 $\Omega$) connected to the collector circuit is 0.8 V. The collector current is (1) 0.2 mA (2) 2 mA (3) 0.1 mA (4) 1 mA
Out of the following which one is a forward biased diode?
A wheel with 20 metallic spokes each 1 m long is rotated with a speed of 120 rpm in a plane perpendicular to a magnetic field of 0.4 G. The induced emf between the axle and rim of the wheel will be (1 G = 10-4 T) (1) 2.51 V (2) 2.51 10-4 V (3) 2.51 10-5...
The equivalent resistance between A and B for the mesh shown in the figure is (1) 4.8 $\Omega$ (2) 7.2 $\Omega$ (3) 16 $\Omega$ (4) 30 $\Omega$
For the circuit shown in the figure, the current I will be (1) 0.5 A (2) 0.75 A (3) 1 A (4) 1.5 A
Which among the following salt solutions is basic in nature? (1) Sodium acetate (2) Ammonium chloride (3) Ammonium sulphate (4) Ammonium nitrate
The E.M. wave with shortest wavelength among the following is (1) Microwaves (2) Ultraviolet rays (3) X-rays (4) Gamma-rays
The half life of a radioactive sample undergoing $\alpha$ – decay is 1.4 × 1017 s. If the number of nuclei in the sample is 2.0 × 1021, the activity of the sample is nearly (1) 103 Bq (2) 104 Bq (3) 105 Bq (4) 106 Bq
An intrinsic semiconductor is converted into n-type extrinsic semiconductor by doping it with (1) Germanium (2) Phosphorous (3) Aluminium (4) Silver
The Mean Free Path $l$ for a gas molecule depends upon diameter, $d$ of the molecule as (1) $l\propto{1\over d}$ (2) $l\propto{1\over d^2}$ (3) $l\propto d$ (4) $l\propto d^2$
In some plants thalamus contributes to fruit formation. Such fruits are termed as: (1) Parthenocarpic fruit (2) False fruits (3) Aggregate fruits (4) True fruits
Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to: (1) Chilling conditions (2) Gibberellic acid (3) Nitrate (4) Ascorbic acid
In the following in each set a conservation approach and an example of method of conservation are given (a) In situ conservation - Biosphere Reserve (b) Ex situ conservation - Sacred groves (c) In situ conservation - Seed bank (d) Ex situ conservation - ...
Male and female gametophytes do not have an independent free living existence in: (1) Bryophytes (2) Pteridophytes (3) Algae (4) Angiosperms
Which of the following is the correct floral formula of Liliaceae?
Inclusion bodies of blue-green, purple and green photosynthetic bacteria are (1) Microtubules (2) Contractile vacuoles (3) Gas vacuoles (4) Centrioles
Which of the following statements is incorrect? (1) RuBisCO action requires ATP and NADPH (2) RuBisCO is a bifunctional enzyme (3) In C4 plants, the site of RuBisCO activity is mesophyll cell (4) The substrate molecule for RuBisCO activity is a 5-carbon ...
The impact of immigration on population density is (1) Positive (2) Negative (3) Both positive and negative (4) Neutralized by natality
Which of the following is incorrect about Cynobacteria? (1) They have chlorophyll 'a' similar to green plants (2) They are photoautotrophs (3) They lack heterocysts (4) They often form blooms in polluted water bodies
Chromosomal theory of inheritance was proposed by (1) Watson and Crick (2) Sutton and Boveri (3) Bateson and Punnet (4) T.H. Morgan
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