Level 4 Challenge

The total number of progeny obtained through dihybrid cross of Mendel is 1280 in F2 generation. How many of them are recombinants?

During the process of fertilization, when one nucleus fuses with egg and the second with the secondary nucleus, it is called

The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately by

In a pyramid of numbers, representing an ecosystem of a large fresh water pond, the number of primary consumers is

Photochemical combination of hydrocarbons and nitrogen oxides emitted by automobiles produces health threatening

How many meiotic divisions would be required to produce 101 female gametophytes in an angiosperm

Which of the following isotopes is used for finding the fossil age having more than 4500 years?

Which of the following is a recent application of genetic engineering in diagnostic technique?

When the light intensity changes from 1 to 100 units, the response of the eye will increase by

Which of the following chemical was likely to be absent at the time of origin of life?

The pyruvic acid formed during glycolysis is oxidised to CO₂ and H₂O in a cycle called

The portion of DNA which contains information for an entire polypeptide is called as

Pacinian corpuscles occur in the skin of certain parts of body in mammals. These are

The peg like process in the axis that allows the rotatory movement of the skull is

Which of the following is a component of electron transport chain in mitochondria

Which of the following plants have not changed for several thousands of years?

In meiosis, the daughter cells are not similar to that of parent because of

Which cells on grass leaves help in minimizing cuticular transpiration?

The Chipko movement for conservation of forests was started in 1972 in

Leaf abscission, fruit fall, bud dormacy occurs by which phytohormone?

In the phosphorus cycle, weathering makes phosphate available first to

Ultraviolet radiations from sunlight causes a reaction that produces

Which of the following conducts sugar to different organs in plants?

Which of the following contains the actual genetic part of a sperm?

The idea that life orginates from pre-existing life is referred as

Movement of shoulder muscle and bone is controlled by which nerve?

Plants require which one of the following for the formation of ATP

The amount of air inspired or expired with each normal breathe is

One of the exsitu conservation methods for endangered species is

Which of the following protects the embryo from external injury?

Which of the following plant is an endangered species in India?

Which of the following enzyme is used in genetic engineering?

Genetically dwarf plants can be induced to grow tall by using

Cytoplasm and nucleus are separated by a membrane which is

Oxygen which is liberated during photosynthesis comes from

The pigment responsible for photomorphogenetic response is

In angiosperms, triple fusion results in the formation of

Fungicide is obtained from which of the following plant?

Weed killers generally have properties much like that of

The formation of erythrocytes in foetus takes place in

Which one of the following is an antifungal antibiotic

Ozone layer of upper atmosphere is being destroyed by

Asynchronous contraction of heart muscle is termed as

Littoral zone in the ocean ecosystem comprises of the

The structure that covers the cartilage is known as

The all familiar disease ‘amoebiasis’ is caused by

The function of iris in the eyes of the frog is to

Which of the following is a pair of motor nerves?

Chloroplasts without grana are known to occur in

Which of the following protozoa is a flagellate?

During hibernation period, frog’s respiration is

Due to nitrogenous deficiency chlorosis occur in

Bacteria are considered as plants because they

Function of contractile vacuole in protozoa is

The enzyme which is used for replication is

How many ATPs are generated in respiration?

The body of sponges are mainly composed of

Sclerenchymatous hypodermis is present in

Restriction endonuclease is employed for

The joint of femur with pelvic girdle is

Name the type of tissue that forms gland

Coryza disease in poultry spreads by

Territoriality occurs as a result of

Genetic engineering is related with

The protein coat of virus is called

Opening of flower is an example of

Intercalary meristem occurs at the

Renal portal system is absent in

The end product of glycolysis is

The lateral roots originate from

Cholesterol is the precursor of

What is the work of centrosome?

In mammals, milk is digested by

In C₄ plants, CO₂ combines with

Heart beats are accelerated by

Water lost by transpiration is

Lattisimus dorsalis muscle is

Pencillium belongs to class

Food poisoning is due to

Mumps is an infection of

The ovary is inferior in

Myoglobin is present in

Chlamydomonas occurs in

Smallest bacterium is

CO is harmful because

Constituent of RNA is

Embryo sac represents

Prostate gland is a

Emasculation means

Azospirillum is a

The pH value of the solution in which a particular amino acid dose not migrate the influence of an electric field is called the

Standard reduction potential for Al³⁺ / Al , Fe²⁺ / Fe, Br/Br are ₋1.66 V, ₋0.45 V, 1.09 V. Order of their reducing capacity is

The compounds CHCl₃ and HF lead to the formation of a compound of fluorine of molecular weight 70.The compound is

A gas mixture contains 50% He and 50% Methane by volume. What is the percent by weight of methane in the mixture?

The amount of electricity requried to deposit 0.9 g of aluminium, when the electrode reaction is Al³⁺ + 3e⁻ → Al

At when pressure will a quantity of gas, which occupies 100 mL at a pressure of 720 mm, occupy a volume of 84 mL

The bad smelling substance,formed by the action of alocoholic caustic potash on chloroform and aniline,is

The coordination number and oxidation number of X in the following compound [X(SO₄)(NH₃)₅]Cl will be

If the manufacture of bromine from sea water, the mother liquor containing bromides is treated with

What will be the correct relationship between free energy and equilibrium constant K of a reaction?

Vapour density of a metal chloride is 77. If its equivalent weight is 3, its atomic weight will be

A gas decolourised by KMnO₄ solution but gives no precipitate with ammoniacal cuprous chloride is

certain crystals produce electric signals on application of pressur.This phenomenon is called

Which one of the following compounds on nitration easily produces nitro derivative

100 cm of a given sample of H₂O₂ gives 1000 cm³ of O₂ at STP. The given sample is

The two ice cubes kept pressed against each other, stick to each other due to

The calorific value of fats,carbohydrates and proteins is in the order of

Borax is used as a cleansing agent because on dissolving in water it gives

How many electrons in an atom with atomic number 105 can have (n + l) = 8

Which of the following is obtained,when formaldehyde reacts with ammonia

How many unpaired electrons are present in ground state for Fe²⁺(Z=26)

An increase in pressure would favour which of the following reaction?

The oxidation state of sulpur in sodium tetrathionate (Na₂S₄O₆) is

Of the following complex ions one exhibits isomerism.That one is

Which of the following is contained in alcoholic beverages

Which one of the following is not an amphoteric substance

The correct order of ionization energy of C, N, O, F is

Which one of the following contain isopropyl group

Among the following the least thermally stable is

Which of the following will not act as a buffer?

The element, with atomic number 118, will be

Which of the following is an amphoteric oxide

Which one of the following is the heaviest

Phenyl isocyanide test is used to identify

Excess nitrate in drinking water can cause

The bond angle of sp² – hybrid orbital is

Action of acetylene on dilute H₂SO₄ gives

An emulsion is a colloidal dispersion of

Schottky defect generally appears in

IUPAC name of CH₃–O–C₂H₅ is

Veronal is what type of drug

Dialysis can separate

Transition elements

Glycerine is a/an

Aspirin is an

A transistor is operated in common emitter configuration at constant collector voltage Vc = 1.5 V such that a change in the base current from 100 µA to 150 µA produces a change in the collector current from 5 mA to 10 mA. The current gain is

One mole of an ideal gas at an initial temperature of T K, does 6R joule of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 5/3, the final temperature of gas will be

A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be

A wire mesh consisting of very small squares is viewed at a distance of 8 cm through a magnifying converging lens of focal length 10 cm, kept close to the eye. The magnification produced by the lens is

The refractive index of water, glass and diamond are 1.33, 1.50, 2.40 respectively. The refractive index of diamond relative to water and of glass relative to diamond, respectively are nearly

A bullet of mass 0.05 kg moving with a speed of 80 m/s enters a wooden block and is stopped after a distance of 0.40m. The average resistive force exerted by the block on the bullet is

A particle of mass m executes simple harmonic motion with amplitude a and frequency v. The average kinetic energy during its motion from the position of equilibrium to the end is

A current is flowing through resistance. A potential difference of 120 V is applied across resistance. Power dissipated in resistance is 60W. Find current flowing through it

Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept at 50° C and 60° C. Amount of heat absorbed by the conductor when a charge of 10C flows through it is

The masses of two radioactive substances are same and their half lives are 1 year and 2 years respectively. The ratio of their activities after 6 years will be

A 10 micro farad capacitor is charged to 500 V and then its plates are joined together through a resistance of 10 ohm. The heat produced in the resistance is

An electric current passes through a long straight wire. At a distance 5 cm from the wire, the magnetic field is B. The field at 20 cm from the wire would be

A transistor is working in common emitter mode. Its amplification factor is 80. If the base current is 250 µA, what is the current at the collector?

A force of 5 N is acting on an object. Displacement of object is 10 m and the work done on it is 25 J. The angle between force and displacement is

A man measures time period of a pendulum(T) in stationary lift. If the lift moves upwards with acceleration g/4, then the new time period will be

A carnot’s engine operates with source at 127° C and sink at 27° C. If the source supplies 40 kJ of heat energy, the work done by the engine is

If a star converts all helium in its core to oxygen, then energy released per oxygen nuclei is(Mass of He=4.0026 amu, Mass of O=15.99994 amu)

The escape velocity from the earth is Ve. The escape velocity from a planet whose radius is 4 times and density is 9 times that of earth is

The de-Broglie wavelength of a proton(charge = 1.6 x 10⁻¹⁹ C, Mass = 1.6 x 10⁻²⁷ kg) accelerated through a potential difference of 1 kV is

The radius of gyration of a solid sphere of radius r about a certain axis is r. The distance of this axis from the centre of the sphere is

A rocket with a lift-off mass 3.5 x 10⁴ kg is blasted upwards with an initial acceleration of 10 m/s². The initial thrust of the blast is

A body rolls down a stair case of 5 steps. Each step has height 0.1 m and width 0.1 m. With what velocity will the body reach the bottom

A wheel has moment of inertia 5 x 10⁻³ kgm² and is making 20 revolutions per sec. The torque need to stop it in 10 sec is ___ x 10⁻²Nm

Two forces of magnitude 8N and 15N respectively act at a point so as to make the resultant force 17N. The angle between the forces is

The excess pressure inside one soap bubble is three times that inside a second soap bubble, then the ratio of their surface area is

A perfect gas at 27° C is heated at constant pressure to 327° C. If original volume of gas at 27° C is V, then volume at 327° C is

When the length of the vibrating segment of a sonometer wire is increased by 1%, the percentage change in its frequency is

Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100 V. The self inductance of the coil is

A coil of resistance 20 ohm and inductance 5H is connected with a 100 V battery. Energy stored in the coil will be

Two balls are dropped from heights h and 2h respectively. The ratio of times of these balls to reach the earth is