GRAND TEST 15 FOR NEET 2021

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51.All are true except?

52.Gelatinous sheath is a common feature of the following

53.Slime moulds under suitable condition form ___________ which may grow and spread over several feet

54.Match the column

Column-I                                Column-II

1. R.Green algae                i. Agar
2. Q.Gracilaria                   ii. Tap root
3. R.Sphagnum                   iii. Multicellular sex organ
4. S.Sequoia                          iv. Pectose

55.The type of aestivation found in Calotropis is

56.Which of the statement is true about the floral formula?

57.Bast fibres are made up of

58.Which of the following statement is correct?

59.Pachytene occurs during

60.During prophase if there is 4 chromosomes present then how many chromosomes are there in each cell at the end of anaphase?

61.Spindle fibres attach to kinetochores of chromosomes in the phase

62.Identify the mechanism of transport and ‘Q’ in the given diagram

63.Aquaporin facilitates

64.____________ is ultimately responsible for enlargement and extension growth of cells

65.The main constituent of the ring structure of chlorophyll is

66.

The above mentioned phenomenon occurs in

67.In photosynthesis, the first step is

68.The dark reaction will be affected if ___________ is changed

69.Name A, B, C, D in the following reaction pathway

70.Identify A in the following reaction

71.The phenomenon of heterophylly is an example of

72.Match the column

Column-I                                Column-II

A. IAA                    i.Gaseous

B. Kinetin                 ii. Tarpenes

C. Gibberellic acid   iii. Adenine derivatives

D.Ethylene                 iv.Indole compounds

73.Identify the Q in the given diagram

74.A typical matured angiosperm embryo sac is of

75.The common feature of geitonogamy and autogamy is

76.Emasculation refers to

77.In watermelons, the allele for green colour (G) is dominant over the allele for striped colour (g) and the allele for short shape(S) is dominant over the allele for long shape(s). When long striped watermelons are crossed with watermelons heterozygous for both traits, what proportion  of the offspring are striped and short?

78.How many different kind of gametes can one organism of genotype A/a, B/B, C/c produce?

79.In all of the Mendel’s experiments, the two alleles causing a trait were

80.When re-flowered snapdragons are crossed with white-flowered snapdragons, their offsprings have pink flowers. This type of genotypic expression is called

81.How many possible phenotypes are there for the ABO blood group

82.A girl with sickle cell anaemia is ___________ for the alleles at that locus

83.What kind of disorder has been represented in the following diagram

84.While proposing the double helical structure for DNA, Watson and Crick had immediately proposed a scheme for replication of DNA in the year of

85.The entire sequence of communities that successively change in a given area are called __________

86.DNA-dependent RNA polymerase acts in the direction of

87.Trichoderma polysporum is used to produce

88.All of the following organisms are extinct now except

89.The notable consequence of higher toxicity of DDT is

90.The prickly pear cactus introduced into Australia in the early 1920’s caused havoc by spreading rapidly into millions of hectares of rangeland. Finally, the invasive cactus was brought under control only after a cactus-feeding moth from its natural habitat was introduced into the country.- This is a typical example of

91.In meiosis, the chromosomes are replicated during?

92.Pleiotropy occurs when a gene has

93.The first event in translation is the binding of the mRNA leader to the

94.Identify the following parts in the given diagram

95. Which of the following statement is correct about C4 plants?

96.The peripheral region of the  ____________ is lighter in colour and is known as     Sapwood

97.Interkinesis is followed by

98.Competitive Exclusion Principle’ Was stated by

99.Nuclear  membrane  is  absent  in 

100.Which one of the following pairs of plants are  not  seed  producers ? 

101.Which of the following group of animal possesses metameres?

102.Cells communicate with each other by

103.Tendons have

104.Identify A, B, C, D in the following diagram

105. Transition state refers to the following

106.The ____________ of Golgi cisternae faces the nucleus

107.The volume of air remaining in the lungs even after a forcible expiration is

108. If communication between SA node and AV node became blocked, which will most likely occur?

109.The QRS complex represents

110.In cortical nephrons which of the following is highly reduced?

111.Glomerular blood flow can stimulated by?

112.___________act as a check on renin-angiotensin mechanism

113.Ketonuria is a sign of

114.The below mentioned diagram represents

115.Gout is characterised by

116.Ca++ activates actin which binds to the myosin head to form a cross bridge.Thi calcium is released from

117.Assertion: Nerve impulses are quick and effective

Reason: The rise in the stimulus-induced permeability to Na+ is extremely shortlived. It is quickly followed by a rise in permeability to K+ . Within a fraction of a second, K+ diffuses outside the membrane and restores the resting potential of the membrane at the site of excitation and the fibre becomes once more responsive to further stimulation.

118.The body temperature is controlled by which brain region?

119.Sip of drink stimulates

120.Demineralization of bone is facilitated by the hormone

121.Which hormone inhibits cellular uptake and utilisation of amino acids?

122.The endocrine pancreas consists of ‘Islets of Langerhans’ which comprises pancreatic tissue by

123.Glucose uptake in adipose tissue is facilitated by

124.Spermatogenesis requires the presence of

125.Menstruation is triggered by an abrupt decline in the amount of

126.Find out the incorrect statement

i.  Intra cytoplasmic sperm injection (ICSI) is another specialised procedure to form an embryo in the uterus in which a sperm is directly injected into the ovum

ii.   Reversibility of Tubectomy and vasectomy is very high

iii.    Pills have to be taken daily for a period of 21 days starting preferably within the first five days of menstrual cycle

iv.   Lippes loop is a non-medicated IU

127.The programmes called ‘family planning’ were initiated in

128.LNG-20 works by

129.Saltation theory of evolution was proposed by

130.All have come in the Jurassic period except?

131.The substance responsible for the chill and high fever recurring every three to four days in malaria. It is

132.Entamoeba histolytica is carried by _________ and causes amoebiosis

133.Find out the correct order for plant breeding programmes

134.Ampicillin acts as _____________ in coli for the recombination of DNA

135.The first step towards gene therapy was

136.Post-anal tail is absent in

137.Which one of the following is dedicated to secrete gastric juice in Periplaneta?

138.All are true except?

139.Enterokinase secretes from

140.The first vertebra articulates with

141.Glenoid cavity is

142.Photo pigments are composed of

143._____________ acts on the exocrine pancreas and stimulates secretion of water and bicarbonate ions

144.Darwin’s finches represent one of the best examples of this phenomenon

145.Colostrum provides

146.Allergens trigger to produce

147.Flocs are

148.The technology of biogas production was developed in India mainly due to the efforts of

149.Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans. The protein acts like

150.In our stomach, the ________  play very beneficial role in checking disease causing microbes

151.A transition metal M forms a volatile chloride which has a vapour density of 94.8. If it contains 74.75 % of chlorine the formula of the metal chloride will be,

152.A gas occupies a volume of 300 cc at 300 K and 620 mm Hg pressure. The volume of gas at 320 K and 640 mm Hg pressure is,

153.The ratio of magnetic moment (spin only) of Fe(III) and Co(II) is,

154.In hydrogen atom, if energy of an electron in ground state is 13.6 eV, then that in the 2^nd excited state is,

155.Which one of the following ionic species has the greatest proton affinity to form stable compound?

156.Ionic radii are,

157.Linear combination of two hybridized orbitals belonging to two atoms and each having one electron leads to the formation of,

158.Which of the following species is paramagnetic?

159.When Cl₂ gas reacts with hot and concentrated NaOH solution, the oxidation number of chlorine changes from,

160.In which of the following the hydration energy is higher than the lattice energy?

161.In Castner-Kellner cell for production of sodium hydroxide

162.Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to,

163.The solubility of AgCl with solubility of product 1.6 × 10^-10 in 0.1 M NaCl solution would be,

164.Reduction of 2-butyne with sodium in liquid ammonia gives predominantly

165.2-methylpropan-2-ol cannot be oxidised by Cr(VI) salts in acid medium due to,

166.What is the product of the following reaction?

167.The major product formed when 1, 1, 1-trichloropropane is treated with aqueous potassium hydroxide is:

168.1-propanol and 2-propnol can be distinguished by,

169.The enthalpy of neutralization of a strong acid by a strong base is -57.32 kJ mol^-1. The enthalpy for formation of water and hydrogen ion are -285.84 kJ mol^-1 and 0 kJ mol^-1 The enthalpy of formation of hydroxyl ion is,

170.Permanent hardness is due to presence of soluble salts of magnesium and calcium in the form of chlorides and sulphates in water. Permanent hardness of water can be removed by,

171.Each rubidium halide crystallising in the NaCl type lattice has a unit cell length 0.30 Å greater than that for corresponding potassium salt (r of K⁺ = 1.33 Å) of the same halogen. Hence, ionic radius of Rb⁺ is,

172.In borax, the number of B-O-B links and B-OH bonds present are, respectively

173.Which of the following will not be oxidised by ozone?

174.Given, H₃PO₄ + H₂O ⇋ H₃O⁺ + H₂PO₄^–, pK₁ = 2.15

            H₂PO₄– + H₂O ⇋ H₃O⁺ + HPO₄^–, pK₂ = 7.20

Hence, pH of 0.01 M NaH₂PO₄ is,

175.In the reaction, 2N₂O₅ → 4NO₂ + O₂, initial pressure and rate constant, k are 500 atm and 3.38 × 10^-5 s^-1 After 10 minutes, the final pressure of N₂O₅ is,

176.Which of the following is the correct increasing order of basicity of amines in gaseous phase?

177.The final product of the given reaction is,

178.The reaction of toluene with Cl₂ in presence of FeCl₃ gives X and reaction in presence of light gives Y. Thus, X and Y are,

179.An ideal solution of benzene and toluene boils at 1 atm pressure at 90^o At 90^o C, benzene has a vapour pressure of 1022 mm of Hg and toluene has a vapour pressure of 406 mm Hg. The mole fraction of benzene in the solution is,

180.The IUPAC name of the complex [Co(NH₃)₄(H₂O)Cl]Cl₂ is,

181.Which of the following pair form the same osazone?

182.In which of the following there is outer orbital hybridization?

183.What happens when gelatin is added to gold sol?

184.The following sequence of reaction is given bellow,

Identify the final product ‘C’

which following option is correct?

185.In the following reaction ‘A’ can be,

which following option is correct?

186.The reason for double helical structure of DNA is

187.Formaldehyde + Ammonia → Urotropine + 6H₂ The formula of urotropine is,

188.What does green chemistry mean in terms of environment?

189.Which one of the following statements is not true?

190.Oxidation numbers of A, B and C are +2, +5 and -2 respectively. Possible formula of the compound is,

191.A 0.0020 m aqueous solution of an ionic compound [Co(NH₃)₅(NO₂)]Cl freezes at -0.00732^oC . Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be, (K_f = 1.86^oC/m)

192.Calcium is obtained by,

193.The existence of two different colored complexes with the composition of [Co(NH₃)₄Cl₂]⁺ is due to,

194.The rate constants k₁ and k₂ for two different reactions are 10¹⁶.exp(-2000/T) and 10¹⁵.exp(-1000/T), respectively. The temperature at which k₁ = k₂ is,

195.Standard reduction potentials of the half-reactions, F₂/F-, Cl₂/Cl-, Br₂/Br-, I₂/I- are +2.85 V, +1.36 V, +1.06 V and +0.53 V. The strongest oxidising agent and reducing agent respectively are,

196.Bithionol is added to the soaps as an additive to function as a/an

197.An aqueous solution of FeCl₃ is acidic due to,