NEET 2022 Phase 1 – PYQ Practice

A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the power of the lens is

As the temperature increases, the electrical resistance

In half wave rectification, if the input frequency is 60 Hz, then the output frequency would be

If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is

A shell of mass m is at rest initially. It explodes into three fragments having mass in the ratio 2 : 2 : 1. If the fragments having equal mass fly off along mutually perpendicular directions with speed v, the speed of the third (lighter) fragment is :

Two objects of mass 10 kg and 20 kg respectively are connected to the two ends of a rigid rod of length 10 m with negligible mass. The distance of the center of mass of the system from the 10 kg mass is :

If a soap bubble expands, the pressure inside the bubble

The angle between the electric lines of force and the equipotential surface is

A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid is

Given below are two statements: Statement I : Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element (Idl) of a current carrying conductor only. Statement II : Biot-Savart's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produced by a scalar source, Idl while the latter being produced by a vector source, q. In light of above statements choose the most appropriate answer from the options given below.

The ratio of the radius of gyration of a thin uniform disc about an axis passing through its centre and normal to its plane to the radius of gyration of the disc about its diameter is

The peak voltage of the ac source is equal to

The energy that will be ideally radiated by a 100 kW transmitter in 1 hour is

In a Young's double slit experiment, a student observes 8 fringes in a certain segment of screen when a monochromatic light of 600 nm wavelength is used. If the wavelength of light is changed to 400 nm, then the number of fringes he would observe in the same region of the screen is

A body of mass 60 g experiences a gravitational force of 3.0 N, when placed at a particular point. The magnitude of the gravitational field intensity at that point is

Plane angle and solid angle have

Two pendulums of length 121 cm and 100 cm start vibrating in phase. At some instant, the two are at their mean position in the same phase. The minimum number of vibrations of the shorter pendulum after which the two are again in phase at the mean position is :

From Ampere's circuital law for a long straight wire of circular cross-section carrying a steady current, the variation of magnetic field in the inside and outside region of the wire is

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The stretching of a spring is determined by the shear modulus of the material of the spring. Reason (R) : A coil spring of copper has more tensile strength than a steel spring of same dimensions. In the light of the above statements, choose the most appropriate answer from the options given below:

The volume occupied by the molecules contained in 4.5 kg water at STP, if the intermolecular forces vanish away is

A nucleus of mass number 189 splits into two nuclei having mass number 125 and 64. The ratio of radius of two daughter nuclei respectively is

Which of the following p-V curve represents maximum work done?

Which compound amongst the following is not an aromatic compound?

The IUPAC name of an element with atomic number 119 is

The incorrect statement regarding enzymes is

Gadolinium has a low value of third ionisation enthalpy because of

Amongst the following which one will have maximum 'lone pair - lone pair' electron repulsions?

Which of the following statement is not correct about diborane?

Given below are two statements : Statement I : The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole - dipole interactions. Statement II : The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding. In the light of the above statements, choose the most appropriate answer from the given below

The incorrect statement regarding chirality is

Which of the following sequence of reactions is suitable to synthesize chlorobenzene?

Identify the incorrect statement from the following.

The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

Given below are two statements: Statement I: The acidic strength of monosubstituted nitrophenol is higher than phenol because of electron withdrawing nitro group. Statement II : o-nitrophenol, m-nitrophenol and p-nitrophenol will have same acidic strength as they have one nitro group attached to the phenolic ring. In the light of the above statements, choose the most appropriate answer from the options given below :

In one molal solution that contains 0.5 mole of a solute, there is

Which amongst the following is incorrect statement?

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?

Which of the following is not a method of ex situ conservation?

Identify the correct set of statements: (a) The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea (b) Axillary buds form slender and spirally coiled tendrils in cucumber and pumpkin (c) Stem is flattened and fleshy in Opuntia and modified to perform the function of leaves (d) Rhizophora shows vertically upward growing roots that help to get oxygen for respiration (e) Subaerially growing stems in grasses and strawberry help in vegetative propagation Choose the correct answer from the options given below:

Given below are two statements: Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microbes. Statement II : Decomposition is faster if the detritus is rich in lignin and chitin. In the light of the above statements, choose the correct answer from the options given below :

Hydrocolloid carrageen is obtained form :

Which one of the following plants shows vexillary aestivation and diadelphous stamens?

Which of the following is incorrectly matched?

The process of translation of mRNA to proteins begins as soon as:

Which one of the following never occurs during mitotic cell division?

Which one of the following is not true regarding the release of energy during ATP synthesis through chemiosmosis? It involves:

Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for :

What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid?

"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which:

Which one of the following plants does not show plasticity?

DNA polymorphism forms the basis of:

XO type of sex determination can be found in :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Polymerase chain reaction is used in DNA amplification. Reason (R) : The ampicillin resistant gene is used as a selectable marker to check transformation. In the light of the above statements, choose the correct answer from the options given below :

The gaseous plant growth regulator is used in plants to:

Given below are two statements: Statement I : Cleistogamous flowers are invariably autogamous Statement II : Cleistogamy is disadvantageous as there is no chance for cross pollination In the light of the above statements, choose the correct answer from the options given below :

Exoskeleton of arthropods is composed of:

Read the following statements and choose the set of correct statements: (a) Euchromatin is loosely packed chromatin (b) Heterochromatin is transcriptionally active (c) Histone octamer is wrapped by negatively charged DNA in nucleosome (d) Histones are rich in lysine and arginine (e) A typical nucleosome contains 400 bp of DNA helix Choose the correct answer from the options given below :

Which one of the following statements cannot be connected to Predation?

The flowers are Zygomorphic in : (a) Mustard (b) Gulmohar (c) Cassia (d) Datura (e) Chilly Choose the correct answer from the options given below :

Read the following statements about the vascular bundles: (a) In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii. (b) Conjoint closed vascular bundles do not possess cambium (c) In open vascular bundles, cambium is present in between xylem and phloem (d) The vascular bundles of dicotyledonous stem possess endarch protoxylem (e) In monocotyledonous root, usually there are more than six xylem bundles present Choose the correct answer from the options given below :

Identify the incorrect statement related to Pollination:

Which one of the following statement is not true regarding gel electrophoresis technique?

Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants:

What amount of energy is released from glucose during lactic acid fermentation?

In old trees the greater part of secondary xylem is dark brown and resistant to insect attack due to : (a) secretion of secondary metabolities and their deposition in the lumen of vessels. (b) deposition of organic compounds like tannins and resins in the central layers of stem. (c) deposition of suberin and aromatic substances in the outer layer of stem. (d) deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem. (e) presence of parenchyma cells, functionally active xylem elements and essential oils. Choose the correct answer from the options given below :

The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:

Given below are two statements: Statement I : Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance. Statement II : Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour, flower colour, pod shape and colour, flower position and stem height. In the light of the above statements, choose the correct answer from the options given below :

Transposons can be used during which one of the following?

Which of the following occurs due to the presence of autosome linked dominant trait?

Which one of the following will accelerate phosphorus cycle?

In the following palindromic base sequences of DNA, which one can be cut easily by particular restriction enzyme?

Read the following statements on lipids and find out correct set of statements : (a) Lecithin found in the plasma membrane is a glycolipid (b) Saturated fatty acids possess one or more c = c bonds (c) Gingely oil has lower melting point, hence remains as oil in winter (d) Lipids are generally insoluble in water but soluble in some organic solvents (e) When fatty acid is esterified with glycerol, monoglycerides are formed Choose the correct answer from the option given below:

If a geneticist uses the blind approach for sequencing the whole genome of an organism, followed by assignment of function to different segments, the methodology adopted by him is called as :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Mendel's law of independent assortment does not hold good for the genes that are located closely on the same chromosome. Reason (R) : Closely located genes assort independently. In the light of the above statements, choose the correct answer from the options given below :

The anatomy of springwood shows some peculiar features. Identify the correct set of statements about springwood. (a) It is also called as the earlywood (b) In spring season cambium produces xylem elements with narrow vessels (c) It is lighter in colour (d) The springwood along with autumn wood shows alternate concentric rings forming annual rings (e) It has lower density Choose the correct answer from the options given below:

In-situ conservation refers to :

In which of the following animals, digestive tract has additional chambers like crop and gizzard?

If the length of a DNA molecule is 1.1 metres, what will b the approximate number of base pairs?

Given below are two statements: Statement I : Autoimmune disorder is a condition where body defense mechanism recognizes its own cells as foreign bodies. Statement II : Rheumatoid arthritis is a condition where body does not attack self cells. In the light of the above statements, choose the most appropriate answer from the options given below :

Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis? (a) It results in the formation of haploid gametes (b) Differentiation of gamete occurs after the completion of meiosis (c) Meiosis occurs continuously in a mitotically dividing stem cell population (d) It is controlled by the Luteinising Hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary (e) It is initiated at puberty Choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Osteoporosis is characterised by decreased bone mass and increased chance of fractures. Reason (R) : Common cause of osteoporosis is increased levels of estrogen. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: Statement I : Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence. Statement II : Restriction endonucleases cut the DNA strand a little away from the centre of the palindromic site. In the light of the above statements, choose the most appropriate answer from the options given below :

Lippe's loop is a type of contraceptive used as:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : All vertebrates are chordates but all chordates are not vertebrates. Reason (R) : Notochord is replaced by vertebral column in the adult vertebrates. In the light of the above statements, choose the most appropriate answer from the option given below:

Which of the following is not a connective tissue?

Nitrogenous waste is excreted in the form of pellet or paste by :

Regarding Meiosis, which of the statements is incorrect?

In an E. Coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?

Which of the following is a correct match for disease and its symptoms?

Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A :

Given below are two statements: Statement I : Mycoplasma can pass through less than 1 micron filter size. Statement II : Mycoplasma are bacteria with cell wall. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements: Statement I : The coagulum is formed of network of threads called thrombins. Statement II : Spleen is the graveyard of erythrocytes. In the light of the above statements, choose the most appropriate answer from the options given below :

Which of the following statements with respect to Endoplasmic Reticulum is incorrect?

Tegmina in cockroach, arises from

Given below are two statements : Statement I : The release of sperms into the seminiferous tubules is called spermiation. Statement II : Spermiogenesis is the process of formation of sperms from spermatogonia. In the light of the above statements, choose the most appropriate answer from the options given below :

If '8' Drosophila in a laboratory population of '80' died during a week, the death rate in the population is ___________ individuals per Drosophila per week.

Natural selection where more individuals acquire specific character value other than the mean character value, leads to

Which of the following is not the function of conducting part of respiratory system?

In the taxonomic categories which hierarchical arrangement in ascending order is correct in case of animals?

At which stage of life the oogenesis process is initiated?

In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:

Select the incorrect statement with reference to mitosis :

Detritivores breakdown detritus into smaller particles. This process is called :

If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?

Select the incorrect statement with respect to acquired immunity.

Statements related to human Insulin are given below. Which statements is/are correct about genetically engineered Insulin? (a) Pro-hormone insulin contain extra stretch of C-peptide (b) A-peptide and B-peptide chains of insulin were produced separately in E.coli, extracted and combined by creating disulphide bond between them. (c) Insulin used for treating Diabetes was extracted from Cattles and Pigs. (d) Pro-hormone Insulin needs to be processed for converting into a mature and functional hormone. (e) Some patients develop allergic reactions to the foreign insulin. Choose the most appropriate answer from the options given below :

Which one of the following statements is correct?

The recombination frequency between the genes a & c 5&, b & c is 15%, b & d is 9%, a & b is 20%, c & d is 25% and a & d is 29%. What will be the sequence of these genes on a linear chromosome?

Which of the following is not a desirable feature of a cloning vector?

Which of the following statements is not true?

Select the incorrect statement regarding synapses :

Which of the following is a correct statement?