E2IIPART TEST 4 for NEET 2023

1.The major event of mitotic prophase include all except

2.In a cell cycle mitosis occurs between

3.Which one of the following is the correct stage for observing  minimally coiled chromosome?

4.Mitotic spindle is made up of

5.Mitotic apparatus are

6.During metaphase the spindle fibres are attached to

7.When do the sister chromosomes become daughter chromosomes

8.These are the characteristics of a certain stages. Identify the stage

I.Centromeres split and chromatids separate

II.Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements

III.Chromatids move to opposite poles

IV.Nuclear envelope develops around the chromosome clusters at each pole forming two daughter nuclei

9.Appearance of furrow in the plasma membrane is a typical feature of

10.Which of the following is true for prophase?

11.Yeast can progress through cell cycle in

12.In a human the average duration of cell cycle is ____i____ and cell division lasts ______ii______

13.In animal during cell cycle the centrioles duplicates in

14.The most active phase of cell cycle for protein synthesis is

15.Identify the process being shown in the given diagram

16.If one has to perform a chemical analysis for organic compound in living organisms, he has to grind all with __________ to obtain a slurry

17.Which of the following component is present in highest amount in Human body?

18.Amino acids are substituted

19.Amino acid alanine has the R group of

20.All of the following is acidic except?

21.

In the following reaction the A is

22.Which of the following statement/(s)  is/are correct?

i.Arachidonic acid has 20 carbon atoms excluding the carboxyl carbon

ii.If a phosphate group is found esterified to the sugar they are called nucleosides

iii.Carotenoids are the primary metabolites of plant body

iv.One, those which have molecular weights less than one thousand Dalton and are usually referred to as micromolecules

23.Assertion : Lipids are strictly macromolecules

Reason: Cell membrane and other membranes are broken into pieces, and form vesicles which are not water soluble. Membrane fragments in the form of vesicles get separated along with the acid insoluble pool and hence in the macromolecular fraction

24.All of them are protein except?

25.The most abundant protein in the whole of the biosphere is

26.Which of the following statement is incorrect?

27.A general rule of thumb is that rate doubles or decreases by half for every ________ change in either direction

28.Study the given graph and say what will happen when ‘P’ is at a lower level than ‘S’?

29.Assertion: Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity.

Reason: Proteins are denatured by heat.

30.Identify the category of enzyme from the given diagram

31.A spring 40 mm long is stretched by the application of a force. If 10 N force required to stretch the spring through 1 mm, then work done in stretching the spring through 40 mm is

32.Two springs with spring constants k1 = 1500 N/m and k2 = 3000 N/m are stretched by the same force. The ratio of potential energy stored in the springs will be 

33.A block of mass 2 kg moving with velocity of 10 m/s on a smooth surface hits a spring of force constant 80×10^3 as shown. The maximum compression in the spring is

34.A particle is moving on the circular path of the radius (R) with centripetal acceleration ac=k^2Rt^2. Then the correct relation showing power (P) delivered by net force versus time (t) is 

35.. A steel wire can withstand a load up to 2940 N. A load of 150 kg is suspended from a rigid support. The maximum angle through which the wire can be displaced from the mean position, so that the wire does not break when the load passes through the position of equilibrium, is

36.A body is thrown vertically up with certain initial velocity, the potential and kinetic energies of the body are equal at a point P in its path. If the same body is thrown with double the velocity upwards, the ratio of potential and kinetic energies of the body when it crosses the same point, is 

37.A force F is applied on a body which moves with a velocity v in the direction of the force, then the power will be

38.Potential energy (U) related to coordinates is given by U = 3(x + y). Work was done when the particle is going from (0, 0), (2, 3) is:

39.When a body moves with a constant speed along a circle 

40.As per given figure to complete the circular loop what should be the radius if initial height is 5 m?

41. A stone of mass 1 kg tied to a light inextensible string of length L=10/3m is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the string is 4 and if g is taken to be 10 m/sec², the speed of the stone at the highest point of the circle is 

42.A small block is shot into each of the four tracks as shown below. Each of the tracks rises to the same height. The speed with which the block enters the track is the same in all cases. At the highest point of the track, the normal reaction is maximum in:

43.. The driver of a car travelling at velocity v suddenly sees a broad wall in front of him at a distance d. He should 

44.. Which of the following graph depicts spring constant k versus length l of the spring correctly

45.. A block of mass 50 kg slides over a horizontal distance of 1 m. If the coefficient of friction between their surfaces is 0.2, then work done against friction is 

46.If a vector 2i + 3 j+ 8k is perpendicular to the vector 4j – 4i + ak, then value of a is

47.If A = 4i + 4j + 4k and B = 3i + j + 4k, then angle between vectors A and B is

48.If two vectors are equal in magnitude and their resultant is also equal in magnitude to one of them, then the angle between the two vectors is

49.If A = 3i + 4j and B = 7i + 24j the vector having the same magnitude as B and parallel to A is

50.The sum of the magnitudes of two forces acting at a point is 16N. The resultant of these forces is perpendicular to the smaller forces and has a magnitude of 8 N. If the smaller forces of magnitude x, then the value of x is

51.Two forces A and B have a resultant R1. If B is doubled, the new resultant R2 is perpendicular to A. Then

52.Two forces are such that the sum of their magnitudes is 18 N and their resultant is perpendicular to the smaller force and magnitude of resultant is 12 N. Then the magnitudes of the forces are 

53.If the magnitude of the sum of two vectors is equal to the magnitude of the difference of the two vectors, the angle between these vectors is:

54.A blind person after walking 10 steps in one direction, each of length 80 cm, turns randomly to the left or to the right by 90°. After walking a total of 40 steps the maximum possible displacement of the person from his starting position could be –

55.What is the resultant of three coplanar forces: 300 N at 0°, 400 N at 30° and 400 N at 150°?

56.A child pulls a box with a force of 200 N at an angle of 60° above the horizontal. Then the horizontal and vertical components of the force are –

57.For the figure –

58.A vector A points, vertically upward and, B points towards north. The vector product A×B is –

59.What is the displacement vector of the particle that moves from point P (2,3,5) to point Q (3,4,5)?

60.A fly in the hall of dimensions 10 m×12 m×14 m starts to fly from one corner and ends up at the diametrically opposite corner. What is the magnitude of its flight?

61.The IUPAC name of the compound is:

62.Which one is optically active?

63.The correct statement regarding electrophile is:

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

65.Which one is the correct order of acidity?

66.The most suitable method of separation of o– and p-nitrophenol is:

67.Which of the following compounds can exhibit tautomerism?

68.The correct order of strength of carboxylic acids are?

69.In Duma’s method of estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is25 mm, the percentage of nitrogen in the compound is?

70.In which of the following compounds, the C-Cl bond ionization shall give the most stable carbonium ion?

71. Among the following compounds, hyperconjugation occurs in?

72.In the enolic form of ethyl acetoacetate the number of σ and π bonds present are respectively?

73.Which one is the most reactive towards nucleophilic addition reaction?

74.. Some meta-directing substituents in electrophilic aromatic substitution are given. Which one is the most deactivating?

75. Structure of the compound whose IUPAC name is 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is?

76.Among the following compounds the most reactive towards electrophilic nitration is?

77.The Lassaigne’s extract is boiled with conc. HNO₃ while testing for halogens. By doing so, it:

78.A strong base can abstract ɑ-hydrogen from?

79.The stability of the following carbanions is in the order?

80.If there is no rotation of plane polarized light by a compound in specific solvent, thought to be chiral, it may mean that?

81.The increasing order of nucleophilicity for A) I^–; B) Br^–; C) Cl^– is?

82.Which of the following is correct with respect to the -I effect of the substituent?

83.Which of the following carbocations is expected to be most stable?

84.Two possible stereo structures of CH₃CHOHCOOH, which are optically active, are called?

85.The correct order of increasing bond length of A) C-H; B) C-O; C) C- C and D) C=C is?

86.How many stereoisomers does this compound have?

H₃CCH=CHCH₂CHBrCH₃

87.CH₃-CH(Cl)-CH₂CH₃ has a chiral centre. Which one of the following represents its (R)- configuration?

88.The general formula that represents the homologous series of alkanols is?

89.The compound that is most difficult to protonate is?

90.In the Kjeldahl’s method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1 M H₂SO₄. The percentage of nitrogen in the soil is?