Final Grand Mock Test for NEET 2021

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51.Which statement is true about A in the given diagram?

52.‘Diatomaceous earth’ is created by

53.Red tide toxins are secreted from

54.Cell theory was proposed by

55.The shape of the cell usually vary with

56.Which of the following is true for the plasmid DNA that confers certain unique phenotypic characters to such bacteria

57.Bacterial capsule is

58.The organelles that help bacteria to attach to rocks in streams and to the host tissue is

59.Assertion: The fluid nature of the membrane is important for a cell

Reason: Cell growth, formation of intercellular junctions, secretion, endocytosis, cell division etc. will not be possible to carry on.

60.The transport through Na+/K+ pump is

61.Which of the following statement(s) is/are incorrect?

I.In human beings, the membrane of the erythrocyte has approximately 52 per cent protein and 40 per cent lipids

II.In animal cells lipid-like steroidal hormones are synthesised in RER

III.The tonoplast facilitates the transport of a number of ions and other materials against osmotic pressure into the vacuole

IV.The ribosomes of mitochondria is 70S

62.The major events of mitotic prophase include all of the following except?

63.Nucleolus, golgi complex and ER reform in

64.____________ therefore becomes essential for the cell to restore the nucleo-cytoplasmic ratio

65.Prior to the initiation of meiosis-I, the sister chromatids are produced in

66.

Q in the given diagram refers to

67.Meiosis occurs in

68.The given experiment on the essential role of air in growth of green plants was conducted by

69.The yellow green appearance of leaves is due to

70.PS I and PS II centre have absorption peak likely(in nm)

71.Photosystem I and II are connected through

72.Statement I- As electrons move through the photosystems, protons are transported across the membrane

Statement II- The primary accepter of electron which is located towards the outer side of the membrane transfers its electron not to an electron carrier but to an H carrier

73.All of them are correct about the fate of pyruvic acid except?

74.A and B in the given reaction are respectively

75.Which of the following statement(s) is/are correct about Factors depicted by Mendel

i.Characters are controlled by these discrete units

ii.Factors occur in pair

iii.In a dissimilar pair of factors one member of the pair dominates (dominant) the other (recessive)

iv.In a similar pair of factors one member of the pair dominates (dominant) the other (recessive)

76.The inheritance of Antirrhinum sp. Is a good example of

77.The disease phenylketonuria is caused by

78.The following pedigree shows the inheritance of

79.Assertion: In colour blindness inheritance the mother is not herself colour blind because the gene is recessive

Reason: Its effect is suppressed by her matching dominant normal gene

80.DNA-dependent DNA polymerases catalyse polymerisation in the direction

81.Monascus purpureus is commercially used for the production of

82.Some desert plants like Opuntia, have no leaves – they are reduced to spines– and the photosynthetic function is taken over by the flattened stems-this exemplify

83.In population ecology N represents

84.Recently, _____________ ‘biodiversity hotspots’ in the world have been proposed for intensive conservation efforts

85.The Western Ghats have a greater amphibian species diversity than the Eastern Ghats because of

86.In ETS the Complex-II refers to

87.The Primary Acceptor of CO2 in C3 plant is

88.Protonema stage of Mosses classify them as

89.When fats are used in respiration, the RQ is

90.Systems of classification were based on natural affinities among organisms

91.The scientific process by which crop plants are enriched with certain nutrients is known as

92.Green revolution was dependent to large extent on plant breeding technique for the development of high yielding and disease-resistant varieties of

93.Which of the following is done to evolve a pureline of an animal?

94.Parthenocarpy is induced by

95.Assertion: while shoot apices modify themselves into flowering apices prior to flowering, they (i.e., shoot apices of plants) by themselves cannot perceive photoperiods

Reason: The site of perception of light/dark duration is the leaves

96.Photosynthetic carbon fixation will be retarded in the deficiency of

97.Identify the A and B in the given diagram

98.The transpiration driven ascent of xylem sap depends mainly on the

99.The ‘ring’ arrangement of ___________ is a characteristic of dicot stem

100.Solanum nigrum (Makoi) plant shows the floral formula

101.Which of the following combinations of phylum and description is incorrect?

102.Segmentation was first apparent in the

103.Which one of the following is not a characteristic of insects?

104.Match the following

Column-I                               Column-II

i.Loligo                        a. Nephridia

ii.Echinus             b.Electric organ

iii.Torpedo          c.Water vascular system

iv.Pheretima       d.Radula

105.Identify A and B molecule in the following structure

106.The positional information in a protein – which is the first amino acid, which is second, and so on – is called

107.Name the two state I the following diagram

108.In the control of bacterial pathogens which enzymatic strategy is used

109.All are co-enzyme except?

110.Which of the following statements are incorrect?

111.Which of the following is true for the CO₂ concentration?

12.The alveoli of lungs are lined by

113.The rate of breathing is controlled by

114.Histamine, serotonin, heparin, etc., and are involved in inflammatory reactions secreted by

115.Which of the following statement is correct?

116.The SAN can generate the maximum number of action potentials of

117.Each artery and vein consists of three layers , the middle layer is composed of

118.Name the following in the diagram

119.__________ is caused by deposits of calcium, fat, cholesterol and fibrous tissues, which makes the lumen of arteries narrower

120.ECG is a graphical representation of the electrical activity of the heart during

121.The cortical region of kidney comprised of

122.Peritubular capillaries are formed by

123.Osmoreceptors in the body are activated by

124.Neurohypophysis is dedicated to secrete

125.Match the hormone with their action

Column-I                                Column-II

i.LH                                     a.Electrolyte balance

ii.Vasopressin                   b.Androgen synthesis

iii.Melatonin             c.Stress response

iv.Catecholamine      d. Sleep-wake cycle               

126.All are stimulatory action of cortisol except?

127.Which of the following statement is correct?

128.All are second messenger except?

129.Name the following parts labelled in the given diagram

130.LH acts at the _____i_____ and stimulates synthesis and secretion of _____ii_______

131.The ovarian hormone that reach at peak in luteal phase is

132.In vasectomy, a small part of the vas deferens is removed or tied up through a small incision on the

133.Trichophyton and Epidermophyton are responsible for

134.Name the Enzyme A and the process B in the given diagram

135.Nematode-specific genes were introduced into the host plant to protect from the parasite by

136.The female reproductive system lying laterally in Periplaneta

137.There are total ______ ganglia are present in the thorax of Periplaneta

138.The three pairs of salivary glands are

139.Which of the following statements are correct

140.The majority of reabsorption occurs in the

141.According to increasing brain size the correct order of primitive human are

142. All statemnets are correct except?

143.Disorder affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle known as

144.All are function of hypothalamus except?

145.With each taste of food or sip of drink, the brain integrates the differential input from the taste buds and a complex flavour is perceived because we have

146.The greatest amount of energy is available at which of the following levels?

147.The role of decomposers in nitrogen cycle is

148.Gene therapy was first applied to treat

149.Which of the following defines transgenic animals?

150.Presence of large amounts of nutrients in waters causes

151.In which of the following pairs, both species have similar geometry?

152.The relative ease of dehydration of following alcohols is,

I.CH₃CH(OH)CH₃

II.(CH₃)₃COH

III.CH₃CH₂CH₂OH

153.An element (atomic mass = 300) crystallizes in a simple cubic. If the density of the unit cell is 9.5 g/cc, what is the radius of the element?

154.Calculate the q and w for the isothermal reversible expansion of one mole of an ideal gas from an initial pressure of 1.0 bar to a final pressure of 0.1 bar at a constant temperature of 273 K.

155.The following structure is,

156.The increasing order of number of atoms present in the following is,

I.52 moles of Ar

II.52 u of He

III.52 g of He

157.To avoid the precipitation of hydroxides of Ni²⁺, Co²⁺, Zn²⁺, and Mn²⁺ along with those of Fe³⁺, Al³⁺ and Cr³⁺ the third group of solution will be,

158.The order of the magnitude of ionic radii of ions N^3-, O^2- and F^– is,

159.Phenol associated in benzene to a certain extent to form dimer. A solution containing 2 × 10^-2 kg of phenol in 1.0 kg of benzene has its freezing point decreased by 0.69 K. The degree of association of phenol is, (K_f (benzene) = 5.12)

160.Nitrobenzene on reduction with LiAlH4 in the presence of ether gives

161.The following quantum numbers are possible for how many orbitals? n = 3, l = 2, m = +2

162.The maximum concentration of M⁺ ions that can be attained in a saturated solution of M₂SO₄ at 298 K is (Ksp = 1.2 × 10^-5)

163.The hormone that controls the contraction of the uterus after child birth and releases milk from the mammary glands is,

164.A solution of (+)-1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of SbCl₅, due to formation of,

165.In acidic medium, KMnO₄ oxidises FeSO₄ Which of the following statements is correct?

166.When 0.1 mol CoCl₃(NH₃)₅ is treated with excess of AgNO₃, 0.2 mol of AgCl are obtained. The conductivity of solution will correspond to,

167.The rate constant of a first order reaction increases by 6 times when its temperature is raised from 27^oC to 28^o The activation energy of the reaction is,

168.The volume of carbon dioxide evolved at S.T.P by heating 7.3 g of Mg(HCO₃)₂ will be,

169.The correct decreasing order of acidic character is,

170.What is the final product (major) ‘A’ in the given reaction?

which of the following answer is correct?

171.Which of the following reagent is used for the conversion of n-propane to propanal?

172.Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is,

173.In Freundlich adsorption isotherm, slope of AB line is

174.The electrode potential of M²⁺/M of 3d-series elements shows positive value for

175.Reaction of diborane with ammonia gives initially,

176.What is the major product formed by HI on reaction with,

which of the following answer is correct?

177.Graph between log k and 1/T [where k is rate constant (in s^-1) and T is temperature (in K)] is a straight line with OX = 5, tan θ = 1/2.303. Hence, -E_a will be,

178.The compound which is not isomeric with diethyl ether is

179.The atomic number of T, P and X are 19, 81 and 17 respectively. Which of the following is correct increasing order of pH of the hydroxide solution of T, P and X?

180.The optically active tartaric acid is named as D-(+) tartaric acid because it has a positive,

181.The dispersed phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charges, respectively. Which of the following statements is not correct?

182.In two containers X and Y, same gas is filled. If the pressure, volume and absolute temperature of gas in X are three times as compared to that in Y and if the mass of X is m g, the mass of Y is,

183.An organic compound X with molecular formula C_xH_yO (having minimum no. of C-atoms) on treatment with K₂Cr₂O₇ gives compound Y which reacts with I₂ and Na₂CO₃ to form triiodomethane. Then the value of x × y is,

184.Which of the following statement is correct?

185.The line spectra of two elements are not identical because,

186.The gas released during anaerobic degradation of vegetation may lead to,

187.The reactions of H₂O₂ are given below,

A.HOCl + H₂O₂ → H₃O⁺ + Cl^– + O₂

B.I₂ + H₂O₂ + 2OH^– → 2I^– + 2H₂O + O₂

     Choose the correct option,

188.Aspartame is one of the good artificial sweeteners whose use is limited to cold foods and soft drinks because,

189.Hard steel can be further hardened by heating it to red hot and then cooling it by plunging it into cold water, this process is called,

190.Which of the following statements is not correct?

191.In vulcanisation of rubber

192.In context with the transition elements, which of the following statements is incorrect?

193.Out of the following, which type of interaction is responsible for the stabilization of α-helix structure of proteins?

194.At low pressure, the van der Waals equation is reduced to,

195.In which of the following coordination entities the magnitude of ∆_o (CFSE in oh field) will be maximum?