Which of the following is correct about viroids?

Which of the following pairs is of unicellular algae?

Floridean starch has structure similar to

Strobili or cones are found in

Bilaterally symmetrical and acoelomate animals are exemplified by

Which of the following statements are true for the phylum-Chordata

(i) In Urochordata notochord extends from head to tail and it is present throughout their life.
(ii) In Vertebrata notochord is present during the embryonic period only.
(iii) Central nervous system is dorsal and hollow.
(iv) Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata.

If the head of cockroach is removed, it may live for few days because

Match the following columns and select the correct option :

Column-I	Column-II
(a) Gregarious,       polyphagous pest	(i) Asterias
(b) Adult with radial      symmetry and larva      with bilateral symmetry	(ii) Scorpion
(c) Book lungs	(iii) Ctenoplana
(d) Bioluminescence	(iv) Locusta

Match the following columns and select the correct option :

Column-I	Column-II
(a) 6-15 pairs of gill slits	(i) Trygon
(b) Heterocercal	(ii) Cyclostomes
(c) Air Bladder	(iii) Chondrichthyes
(d) Poison sting	(iv) Osteichthyes

Ray florets have

The ovary is half inferior in:

Identify the incorrect statement.

The roots that originate from the base of the stem are

The transverse section of a plant shows following anatomical features :

(i) Large number of scattered vascular bundles surrounded by bundle sheath
(ii) Large conspicuous parenchymatous ground tissue
(iii) Vascular bundles conjoint and closed
(iv) Phloem parenchyma absent

Identify the category of plant and its part:

Cuboidal epithelium with brush border of microvilli is found in

Which of the following statements about inclusion bodies is incorrect?

Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?

Identify the substances having glycosidic bond and peptide bond, respectively in their structure

Which one of the following is the most abundant protein in the animals?

Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G₀). This process occurs at the end of

Match the following with respect to meiosis

(A) Zygotene      (i) Terminalization
(B) Pachytene     (ii) Chiasmata
(C) Diplotene      (iii) Crossing over
(D) Diakinesis     (iv) Synapsis

Select the correct option from the following

Dissolution of the synaptonemal complex occurs during

In light reaction, plastoquinone facilitates the transfer of electrons from

The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of

The number of substrate level phosphorylations in one turn of citric acid cycle is

Which of the following is not an inhibitory substance governing seed dormancy?

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop

Select the correct events that occur during inspiration.
(i) Contraction of diaphragm
(ii) Contraction of external inter-costal muscles
(iii) Pulmonary volume decreases
(iv) Intra pulmonary pressure increases

Identify the wrong statement with reference to transport of oxygen.

Match the following columns and select the correct option.

Column-I	Column-II
(a) Eosinophils	(i) Immune response
(b) Basophils	(ii) Phagocytosis
(c) Neutrophils	(iii) Release histaminase, destructive enzymes
(d) Lymphocytes	(iv) Release granules containing histamine

The QRS complex in a standard ECG represents

Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?

Which of the following would help in prevention of diuresis?

Match the following columns and select the correct option.

Column-I	Column-II
(a) Floating Ribs	(i) Located between second and seventh ribs
(b) Acromion	(ii) Head of the Humerus
(c) Scapula	(iii) Clavicle
(d) Glenoid cavity	(iv) Do not connect with the sternum

Match the following columns and select the correct option.

Column-I	Column-II
(a) Organ of Corti	(i) Connects middle ear and pharynx
(b) Cochlea	(ii) Coiled part of the labyrinth
(c) Eustachian tube	(iii) Attached to the oval window
(d) Stapes	(iv) Located on the basilar membrane

Match the following columns and select the correct option

Column-I	Column-II
(a) Pituitary gland	(i) Grave’s disease
(b) Thyroid gland	(ii) Diabetes mellitus
(c) Adrenal gland	(iii) Diabetes insipidus
(d) Pancreas	(iv) Addison’s disease

Select the correct statement

The body of the ovule is fused within the funicle at

The plant parts which consist of two generations - one within the other
(i) Pollen grains inside the anther
(ii) Germinated pollen grain with two male gametes
(iii) Seed inside the fruit
(iv) Embryo sac inside the ovule

Meiotic division of the secondary oocyte is completed

Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle?

Match the following columns and select the correct option.

Column-I	Column-II
(A) Placenta	(i) Androgens
(B) Zona pellucida	(ii) Human Chorionic Gonadotropin (hCG)
(C) Bulbo-urethral	(iii) Layer of the ovum
(D) Leydig cells	(iv) Lubrication of the Penis

Select the option including all sexually transmitted diseases.

In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?

Experimental verification of the chromosomal theory of inheritance was done by

Embryological support for evolution was disapproved by

Select the correct match

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is approximately

Which of the following statements is correct?

The first phase of translation is

From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask

Flippers of Penguins and Dolphins are examples of

Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?

(a) Darwin’s Finches of Galapagos islands.
(b) Herbicide resistant weeds.
(c) Drug resistant eukaryotes.
(d) Man-created breeds of domesticated animals like dogs.

Match the following diseases with the causative organism and select the correct option

Column-I	Column-II
(a) Typhoid	(i) Wuchereria
(b) Pneumonia	(ii) Plasmodium
(c) Filariasis	(iii) Salmonella
(d) Malaria	(iv) Haemophilus

The infectious stage of Plasmodium that enters the human body is

Identify the wrong statement with reference to immunity

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

Match the following columns and select the correct option.

Column-I	Column-II
(a) Clostridium butylicum	(i) Cyclosporin-A
(b) Trichoderma polysporum	(ii) Butyric Acid
(c) Monascus purpureus	(iii) Citric Acid
(d) Aspergillus niger	(iv) Blood cholesterol lowering agent

In gel electrophoresis, separated DNA fragments can be visualized with the help of

Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to

Identify the wrong statement with regard to Restriction Enzymes

The specific palindromic sequence which is recognized by EcoRl is

The sequence that controls the copy number of the linked DNA in the vector, is termed

Match the organism with its use in biotechnology

(a) Bacillus thuringiensis	(i) Cloning vector
(b) Thermus aquaticus	(ii) Construction of first rDNA molecule
(c) Agrobacterium tumefaciens	(iii) DNA polymerase
(d) Salmonella typhimurium	(iv) Cry proteins

Select the correct option from the following:

Which of the following statements is not correct?

Match the following columns and select the correct option.

Column-I	Column-II
(a) Bt cotton	(i) Gene therapy
(b) Adenosine deaminase deficiency	(ii) Cellular defence
(c) RNAi	(iii) Detection of HIV infection
(d) PCR	(iv) Bacillus thuringiensis

The process of growth is maximum during

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their

Which of the following is not an attribute of a population?

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

Match the trophic levels with their correct species examples in grassland ecosystem.

(A) Fourth trophic level   (i) Crow
(B) Second trophic level  (ii) Vulture
(C) First trophic level      (iii) Rabbit
(D) Third trophic level    (iv) Grass

Select the correct option

According to Robert May, the global species diversity is about

Which of the following regions of the globe exhibits highest species diversity?

Match the following

(a) Inhibitor of catalytic activity	(i) Ricin
(b) Possess peptide bonds	(ii) Malonate
(c) Cell wall material in fungi	(iii) Chitin
(d) Secondary metabolite	(iv) Collagen

Choose the correct option from the following

Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.

Choose the correct pair from the following

How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

Name the enzyme that facilitates opening of DNA helix during transcription.

Identify the basic amino acid from the following

Identify the correct statement with regard to G₁ phase (Gap 1) of interphase

Hydrolysis of sucrose is given by the following reaction.
Sucrose + H₂O ⇌ Glucose + Fructose
If the equilibrium constant (K_c) is 2 $$ \times $$ 10¹³ at 800 K, the value of $$\Delta r{G^\Theta }$$ at the same temperature will be :

Which one of the following has maximum number of atoms?

Which of the following is not correct about carbon monoxide?

The calculated spin only magnetic moment of Cr²⁺ ion is?

Which of the following is a basic amino acid?

Paper chromatography is an example of :

For the reaction, 2Cl(g) $$ \to $$ Cl₂(g), the correct option is :

Urea reacts with water to form A which will decompose to form B. B when passed through Cu²⁺ (aq), deep blue colour solution C is formed. What is the formula of C from the following?

On electrolysis of dil. sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be :

An increase in the concentration of the reactants of a reaction leads to change in :

Which of the following alkane cannot be made in good yield by Wurtz reaction?

Identify the incorrect statement.

A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?

Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?

Which of the following set of molecules will have zero dipole moment?

Match the following and identify the correct option.

(A)	CO(g) + H2(g)	(i)	Mg(HCO3)2 + Ca(HCO3)2
(B)	Temporary hardness of water	(ii)	An electron deficient hydride
(C)	B2H6	(iii)	Synthesis gas
(D)	H2O2	(iv)	Non-planar structure

The number of protons, neutrons and electrons in ¹⁷⁵₇₁Lu, respectively, are :

The number of Faradays(F) required to produce 20 g of calcium from molten CaCl₂ (Atomic mass of Ca = 40 g mol^-1) is :

Elimination reaction of 2-Bromo-pentane to form pent-2-ene is :
(A) $$\beta $$-Elimination reaction
(B) Follows Zaitsev rule
(C) Dehydrohalogenation reaction
(D) Dehydration reaction

Identify the correct statements from the following :
(A) CO₂(g) is used as refrigerant for ice-cream and frozen food.
(B) The structure of C₆₀ contains twelve six-carbon rings and twenty five carbon rings.
(C) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
(D) CO is colourless and odourless gas.

Identify the incorrect match.

Name			IUPAC Official Name
(A)	Unnilunium	(i)	Mendelevium
(B)	Unniltrium	(ii)	Lawrencium
(C)	Unnilhexium	(iii)	Seaborgium
(D)	Unununnium	(iv)	Darmstadtium

The freezing point depression constant (K_r) of benzene is 5. 12 K kg mol^-1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is rounded off upto two decimal places :

What is the change in oxidation number of carbon in the following reaction?
CH₄(g) + 4Cl₂(g) $$ \to $$ CCl₄(l) + 4HCl(g)

The rate constant for a first order reaction is 4.606 $$ \times $$ 10^-3 s^-1. The time required to reduce 2.0 g of the reactant to 0.2 g is :

The mixture which shows positive deviation from Raoult's law is :

Which of the following oxoacid of sulphur has $$ - $$ O$$ - $$ O$$ - $$ linkage?

Sucrose on hydrolysis gives :

Find out the solubility of Ni(OH)₂ in 0.1M NaOH. Given that the ionic product of Ni(OH)₂ is 2 $$ \times $$ 10^-15.

The correct option for free expansion of an ideal gas under adiabatic condition is :

Which of the following amine will give the carbylamine test?

Identify compound X in the following sequence of reactions :

Reaction between benzaldehyde and acetophenone in presence of dilute NaOH is known as :

Identify a molecule which does not exist.

As alkene on ozonolysis gives methanal as one of the product, Its structure is :

Anisole on cleavage with Hl gives :

Match the following :

Oxide			Nature
(A)	CO	(i)	Basic
(B)	BaO	(ii)	Neutral
(C)	Al2O3	(iii)	Acidic
(D)	Cl2O7	(iv)	Amphoteric

Which of the following is correct option?

Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :

Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a diameter of 2 m is :

A short electric dipole has a dipole moment of 16 $$ \times $$ 10^-9 Cm. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of $$60^\circ $$ with the dipole axis is :

$$\left( {{1 \over {4\pi {\varepsilon _0}}} = 9 \times {{10}^9}N{m^2}/{C^2}} \right)$$

A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges normally from the opposite surface. If the refractive index of the material of the prism is $$\mu $$, then the angle of incidence is nearly equal to :

A body weighs 72 N on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth?

For which one of the following, Bohr model is not valid?

A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in Water. The mass of water that will rise in this tube is :

A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular scale.
The pitch of the screw gauge is :

An iron rod of susceptibility 599 is subjected to a magnetizing field of 1200 A m^-1. The permeability of the material of the rod is :
$$\left( {{\mu _0} = 4\pi \times {{10}^{ - 7}}Tm{A^{ - 1}}} \right)$$

The phase difference between displacement and acceleration of a particle in a simple harmonic motion is :

The energy equivalent of 0.5 g of a substance is :

A resistance wire connected in the left gap of a metre bridge balances a 10 $$\Omega $$ resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5 m, then the length of 1 $$\Omega $$ of the resistance wire is :

The average thermal energy for a mono-atomic gas is : (k_B is Boltzmann constant and T absolute temperature)

The ratio of contributions made by the electric field and magnetic field components to the intensity of and electromagnetic wave is : (c = speed of electromagnetic waves)

A ball is thrown vertically downward with a velocity of 20 m/s from the top of a tower. It hits the ground after some time with a velocity of 80 m/s. The height of the tower is : (g = 10 m/s²)

A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is :
$$\left( {{\mu _0} = 4\pi \times {{10}^{ - 7}}Tm{{A}^{-1}}} \right)$$

Taking into account of the significant figures, what is the value of $$9.99 m - 0.0099m$$?

Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?

The color code of a resistance is given below :

The values of resistance and tolerance, respectively, are

Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass.
The centre of mass of the system from the 5 kg particle is nearly at a distance of :

The mean free path for a gas, with molecular diameter d and number density n can be expressed as :

A cylinder contains hydrogen gas at pressure 249 kPa and temperature 27$$^\circ $$C
Its density is : (R = 8.3 J mol^-1 K^-1)

A charged particle having drift velocity 7.5$$ \times $$10^-4 ms^-1 in an electric field of 3$$ \times $$10^-10 Vm^-1 has a mobility in m² V^-1s^-1 of :

Dimensions of stress are :

A wire of length L, are of cross section A is hanging from a fixed support. The length of the wire changed to L₁ when mass M is suspended from its free end. The expression for Young's modulus is :

In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency of A is 530 Hz, the original freqnency of B will be :

Two bodies of mass 4 kg and 6 kg are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is :

The capacitance of a parallel plate capacitor with air as medium is 6$$\mu $$F. With the introduction of a dielectric medium, the capacitance become 30 $$\mu $$F The permittivity of the medium is :
$$\left( {{\varepsilon _0} = 8.85 \times {{10}^{ - 12}}{C^2}{N^{ - 1}}{m^{ - 2}}} \right)$$

In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes :

Light with an average flux of 20 W/cm² falls on a non-reflecting surface at normal incidence having surface area 20 cm². The energy received by the surface during time span of 1 minute is :

Which of the following graph represents the variation of resistivity ($$\rho $$) with temperature (T) for copper?

The quantities of heat required to raise the temperature of two solid copper spheres of radii r₁ and r₂ (r₁ = 1.5r₂) through 1 K are in the ratio :

Find the torque about the origin when a force of 3 $$\hat j$$ N acts on a particle whose position vector is 2 $$\hat k$$ m.

In a certain region of space with volume 0.2 m³, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is :

The Brewster's angle i_b for an interface should be :

The increase in the width of the depletion region in a p-n junction diode is due to :

A spherical conductor of radius 10 cm has a charge of 3.2 $$ \times $$ 10^-7 C distributed uniformly. That is the magnetude of electric field at a point 15 cm from the centre of the sphere?
$$\left( {{1 \over {4\pi {\varepsilon _0}}} = 9 \times {{10}^9}N{m^2}/{c^2}} \right)$$

The energy required to break one bond in DNA is 10^-20 J. This value in eV is nearly :

A 40 $$\mu $$F capacitor is connected to a 200 V. 50 Hz ac supply. The rms value of the current on the circuit is, nearly :

An electron is accelerated from rest through a potential difference of V volt. If the de-Broglie wavelength of the electron is 1.227 $$ \times $$ 10^-2 nm, the potential difference is :

Two cylinders A and B of equal capacity are connected to each other via a stop cock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire systems is thermally insulated. The stop cock is suddenly opened. The Process is :

For the logic circuit shown, the truth table is :

The solids which have the negative temperature coefficient of resistance are :

A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is $${\pi \over 3}$$. If instead C is removed from the circuit, the phase difference is again $${\pi \over 3}$$ between current and voltage. The power factor of the circuit is :