NEET 2017 – PYQ Practice

A capacitor is charged by a battery. The battery is removed and another identical unchanged capacitor is connected in parallel. The total electrostatic energy of resulting system

The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length. its new resistance will be

A potentiometer is an accurate and versatile device to make electrical measurements of EMF because the method involves

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (kelvin) and mass m, is

Which one of the following represents forward bias diode ?

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will

The acceleration due to gravity at a height at a height 1 km above the rearth is the same as at a depth d below the surface of earth. Then

A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?

Which of the following statements are correct ? (1)   Centre of mass of a body always coincides with the centre of gravity of the body. (2)   Centre of mass of a body is the point at which the total gravitational torque on the body is zero. (3)   A couple on a body produces both translational and rotational motion in a body (4)   Mechanical advantage greater than one means that small effort can be used to lift a large load.

The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'P', the fractional decrease in radius is

A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be

A particle executes linear simple harmonic motion with an amplitude of 3 cm. When the particle is at 2 cm from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then its time period in second is

A spring of force constant k is cut into lengths of ratio 1 : 2 : 3. They are connected in series and the new force constant is K'. Then they are connected in parallel and force constant is k''. Then k' : k'' is

The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system ?

Which one is the wrong statement ?

Which of the following statements is not correct?

Which of the following is dependent on temperature?

Which of the following reactions is appropriate for converting acetamide to methanamine?

The reason for greater range of oxidation states in actinoids is attributed to

An example of a sigma bonded organometallic compound is

The correct statement regarding electrophile is

The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration ?

Which one of the following pairs of species have the same bond order ?

The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is

With respect to the conformers of ethane, which of the following statements is true?

Which one is the correct order of acidity?

Which one is the most acidic compound?

The heating of phenyl methyl ether with HI produces

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

The pivot joint between atlas and axis is a type of

Which statement is wrong for Krebs' cycle?

Fruit and leaf drop at early stages can be prevented by the application of

Lungs are made up of air-filed sacs, the alveoli. The do not collapse even after forceful expiration, because of

The hepatic portal vein drains blood to liver from

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? (1)  They do not need to reproduce. (2)  They are somatic cells. (3)  They do not metabolise. (4)  All their internal space is available for oxygen transport.

A decrease in blood pressure/volume will not cause the release of

Receptor sites for neurotransmitters are present on

Myelin sheath is produced by

Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation.

Which of the following statements is correct?

GnRH, a hypothalamic hormone, needed in reproduction, acts on

A temporary endocrine gland in the human body is

Hypersecretion of growth hormone in adults does not cause further increase in height, because

Attractants and rewards are required for

Flowers which have single ovule in the ovary and are packed into inflorescence are usualy pollinated by

A dioecious flowering plant prevents both

Functional megaspore in an angiosperm develops into an

In case of proiferans, the spongocoel is lined with flagellated cells called

Which of the following are found in extreme saline conditions?

DNA replication in bacteria occurs

Which of the following components provides sticky character to the bacterial cell?

Viroids differ from viruses in having

Life cycles of Ectocarpus and Fucus respectively are

An example of colonial alga is

Select the mismatch

Zygotic meiosis is characteristic of

Which of the following represents order of 'Horse'?

Which among these is the correct combination of aquatic mammals?

Important characteristic that hemichordates share with chordates is

Double fertilisation is exhibited by

In Bougainvillea, throns are the modifications of

Coconut fruit is a

The morphological nature of the edible part of coconut is

Which of the following are not polymeric?

Which of the following options gives the correct sequence of events during mitosis?

Which of the following statements is correct with reference to enzymes?

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cell. If APC is defective in a human cell, which of the following is expected to occur?

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as :

The DNA fragments separated on an agarose gel can be visualised after staining with

The process of separation and purification of expressed protein before marketing is called :

Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :

Asymptote in a logistic growth curve is obtained when :

Plants which produce characteristic pneumatophores and show vivipary belong to :

A gene whose expression helps to identify transformed cell is known as

Mycorrhizae are the example of :

DNA fragments are

Which ecosystem has the maximum biomass ?

Which one of the following is related to Ex-situ conservation of threatened animals and plants ?

Which of the following in sewage treatment removes suspended solids ?

Alexander Von Humbolt described for the first time :

Select the correct route for the passage of sperms in male frogs :

Frog’s heart when taken out of the body continues to beat for sometime. Select the best option from the following statements. (a) Frog is a poikilotherm (b) Frog does not have any coronary circulation (c) Heart is “myogenic” in nature (d) Heart is autoexcitable

Identify the wrong statement in context of heartwood :

The vascular cambium normally gives rise to :

Root hairs develop from the region of :

Which of the following is made up of dead cells ?

In case of poriferans, the spongocoel is lined with flagellated cells called

Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

Among the following characters, which one was not considered by Mendel in his experiments on pea?

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered ?

Capacitation occurs in

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

The function of copper ions in copper releasing IUD's is :

Which one from those given below is the period for Mendel’s hybridisation experiments ?

A disease caused by an autosomal primary non-disjunction is :

Spliceosomes are not found in cells of :

During DNA replication, Okazaki fragments are used to elongate

Which of the following RNAs should be most abundant in animal cell ?

The final proof for DNA as the genetic material came from the experiments of

MALT constitutes about ________ percent of the lymphoid tissue in human body

Transplantation of tissues/ organs fails often due to non-acceptance by the patient's body. Which type of immuneresponse is responsible for such rejections ?

What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis ?

Which of the following is correctly matched for the product produced by them ?

Select the mismatch :

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survise without oxygen?