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NEET 2020 Exam Paper (180 Q) - Mock Test

Medium 180 Questions 179 min 180 marks

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1medium1 markmcq
Which of the following is not an attribute of a population?
2medium1 markmcq
The process of growth is maximum during:
3medium1 markmcq
The roots that originate from the base of the stem are:
4medium1 markmcq
Match the following diseases with the causative organism and select the correct option.
| Column - I | Column - II |
| :--- | :--- |
| (a) Typhoid | (i) Wuchereria |
| (b) Pneumonia | (ii) Plasmodium |
| (c) Filariasis | (iii) Salmonella |
| (d) Malaria | (iv) Haemophilus |
5medium1 markmcq
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?
6medium1 markmcq
Identify the wrong statement with reference to the gene ‘I’ that controls ABO blood groups.
7medium1 markmcq
Choose the correct pair from the following:
8medium1 markmcq
Select the correct match.
9medium1 markmcq
Match the following columns and select the correct option.
| Column - I | Column - II |
| :--- | :--- |
| (a) Gregarious, polyphagous pest | (i) Asterias |
| (b) Adult with radial symmetry and larva with bilateral symmetry | (ii) Scorpion |
| (c) Book lungs | (iii) Ctenoplana |
| (d) Bioluminescence | (iv) Locusta |
10medium1 markmcq
The infectious stage of Plasmodium that enters the human body is:
11medium1 markmcq
Identify the substances having glycosidic bond and peptide bond, respectively in their structure:
12medium1 markmcq
The plant parts which consist of two generations - one within the other:
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule
13medium1 markmcq
The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are:
14medium1 markmcq
Identify the correct statement with regard to G
1

phase (Gap 1) of interphase.
15medium1 markmcq
Cuboidal epithelium with brush border of microvilli is found in:
16medium1 markmcq
Which of the following statements about inclusion bodies is incorrect?
17medium1 markmcq
Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
18medium1 markmcq
In gel electrophoresis, separated DNA fragments can be visualized with the help of:
19medium1 markmcq
Identify the wrong statement with reference to transport of oxygen.
20medium1 markmcq
Ray florets have:
21medium1 markmcq
The specific palindromic sequence which is recognized by EcoRI is:
22medium1 markmcq
Identify the wrong statement with regard to Restriction Enzymes.
23medium1 markmcq
Which of the following is put into Anaerobic sludge digester for further sewage treatment?
24medium1 markmcq
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
25medium1 markmcq
If the head of cockroach is removed, it may live for few days because:
26medium1 markmcq
Which of the following statements are true for the phylum-Chordata?
(a) In Urochordata notochord extends from head to tail and it is present throughout their life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata.
27medium1 markmcq
Match the organism with its use in biotechnology.
| Column - I | Column - II |
| :--- | :--- |
| (a) Bacillus thuringiensis | (i) Cloning vector |
| (b) Thermus aquaticus | (ii) Construction of first rDNA molecule |
| (c) Agrobacterium tumefaciens | (iii) DNA polymerase |
| (d) Salmonella typhimurium | (iv) Cry proteins |
28medium1 markmcq
Match the following concerning essential elements and their functions in plants:
| Column - I | Column - II |
| :--- | :--- |
| (a) Iron | (i) Photolysis of water |
| (b) Zinc | (ii) Pollen germination |
| (c) Boron | (iii) Required for chlorophyll biosynthesis |
| (d) Manganese | (iv) IAA biosynthesis |
29medium1 markmcq
Identify the incorrect statement.
30medium1 markmcq
Match the following:
| Column - I | Column - II |
| :--- | :--- |
| (a) Inhibitor of catalytic activity | (i) Ricin |
| (b) Possess peptide bonds | (ii) Malonate |
| (c) Cell wall material in fungi | (iii) Chitin |
| (d) Secondary metabolite | (iv) Collagen |
31medium1 markmcq
Meiotic division of the secondary oocyte is completed:
32medium1 markmcq
According to Robert May, the global species diversity is about:
33medium1 markmcq
The first phase of translation is:
34medium1 markmcq
Which of the following regions of the globe exhibits highest species diversity?
35easy1 markmcq
Which of the following statements is not correct?
36medium1 markmcq
The transverse section of a plant shows following anatomical features:
(a) Large number of scattered vascular bundles surrounded by bundle sheath.
(b) Large conspicuous parenchymatous ground tissue.
(c) Vascular bundles conjoint and closed.
(d) Phloem parenchyma absent.
Identify the category of plant and its part:
37medium1 markmcq
Match the following columns and select the correct option.
| Column - I | Column - II |
| :--- | :--- |
| (a) 6 - 15 pairs of gill slits | (i) Trygon |
| (b) Heterocercal caudal fin | (ii) Cyclostomes |
| (c) Air Bladder | (iii) Chondrichthyes |
| (d) Poison sting | (iv) Osteichthyes |
38medium1 markmcq
From his experiments, S.L. Miller produced amino acids by mixing the following in a closed flask:
39medium1 markmcq
Embryological support for evolution was disapproved by:
40medium1 markmcq
The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and in early morning is:
41medium1 markmcq
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:
42medium1 markmcq
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of:
43medium1 markmcq
Bt cotton variety that was developed by the introduction of toxin gene of Bacillusthuringiensis (Bt) is resistant to:
44medium1 markmcq
Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?
(a) Darwin’s Finches of Galapagos islands.
(b) Herbicide resistant weeds.
(c) Drug resistant eukaryotes.
(d) Man-created breeds of domesticated animals like dogs.
45medium1 markmcq
Identify the wrong statement with reference to immunity.
46medium1 markmcq
By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
47medium1 markmcq
Identify the correct statement with reference to human digestive system.
48medium1 markmcq
Match the following columns and select the correct option.
| Column - I | Column - II |
| :--- | :--- |
| (a) Clostridium butylicum | (i) Cyclosporin-A |
| (b) Trichoderma polysporum | (ii) Butyric Acid |
| (c) Monascus purpureus | (iii) Citric Acid |
| (d) Aspergillus niger | (iv) Blood cholesterol lowering agent |
49medium1 markmcq
Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?
50medium1 markmcq
Floridean starch has structure similar to:
51easy1 markmcq
Select the option including all sexually transmitted diseases.
52medium1 markmcq
Match the following with respect to meiosis:| Column - I | Column - II || :--- | :--- || (a) Zygotene | (i) Terminalization || (b) Pachytene | (ii) Chiasmata || (c) Diplotene | (iii) Crossing over || (d) Diakinesis | (iv) Synapsis |
53easy1 markmcq
Which of the following pairs is of unicellular algae?
54medium1 markmcq
Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle?
55medium1 markmcq
Match the following columns and select the correct option.| Column - I | Column - II || :--- | :--- || (a) Bt cotton | (i) Gene therapy || (b) Adenosine deaminase deficiency | (ii) Cellular defence || (c) RNAi | (iii) Detection of HIV infection || (d) PCR | (iv) Bacillus thuringiensis |
56easy1 markmcq
Montreal protocol was signed in 1987 for control of:
57easy1 markmcq
Which of the following is correct about viroids?
58medium1 markmcq
The ovary is half inferior in:
59medium1 markmcq
The enzyme enterokinase helps in conversion of:
60medium1 markmcq
Match the trophic levels with their correct species examples in grassland ecosystem.| Column - I | Column - II || :--- | :--- || (a) Fourth trophic level | (i) Crow || (b) Second trophic level | (ii) Vulture || (c) First trophic level | (iii) Rabbit || (d) Third trophic level | (iv) Grass |
61medium1 markmcq
How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
62hard1 markmcq
Match the following columns and select the correct option.| Column - I | Column - II || :--- | :--- || (a) Organ of Corti | (i) Connects middle ear and pharynx || (b) Cochlea | (ii) Coiled part of the labyrinth || (c) Eustachian tube | (iii) Attached to the oval window || (d) Stapes | (iv) Located on the basilar membrane |
63easy1 markmcq
In water hyacinth and water lily, pollination takes place by:
64easy1 markmcq
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
65hard1 markmcq
In light reaction, plastoquinone facilitates the transfer of electrons from:
66easy1 markmcq
Which of the following is not an inhibitory substance governing seed dormancy?
67easy1 markmcq
Name the enzyme that facilitates opening of DNA helix during transcription.
68medium1 markmcq
Which of the following would help in prevention of diuresis?
69medium1 markmcq
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
70medium1 markmcq
Match the following columns and select the correct option.| Column - I | Column - II || :--- | :--- || (a) Placenta | (ii) Human Chorionic Gonadotropin (hCG) || (b) Zona pellucida | (iii) Layer of the ovum || (c) Bulbo-urethral glands | (iv) Lubrication of the Penis || (d) Leydig cells | (i) Androgens |
71medium1 markmcq
Strobili or cones are found in:
72medium1 markmcq
Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (). This process occurs at the end of:
73medium1 markmcq
Flippers of Penguins and Dolphins are examples of:
74hard1 markmcq
If the distance between two consecutive base pairs is and the total number of base pairs of a DNA double helix in a typical mammalian cell is , then the length of the DNA is approximately:
75medium1 markmcq
The QRS complex in a standard ECG represents:
76medium1 markmcq
Match the following columns and select the correct option.| Column - I | Column - II || :--- | :--- || (a) Eosinophils | (iii) Release histaminase, destructive enzymes || (b) Basophils | (iv) Release granules containing histamine || (c) Neutrophils | (ii) Phagocytosis || (d) Lymphocytes | (i) Immune response |
77easy4 marksmcq
Which of the following statements is correct?
78easy1 markmcq
The sequence that controls the copy number of the linked DNA in the vector, is termed:
79medium1 markmcq
Identify the basic amino acid from the following.
80medium1 markmcq
Match the following columns and select the correct option.| Column - I | Column - II || :--- | :--- || (a) Pituitary gland | (iii) Diabetes insipidus || (b) Thyroid gland | (i) Grave’s disease || (c) Adrenal gland | (iv) Addison’s disease || (d) Pancreas | (ii) Diabetes mellitus |
81medium1 markmcq
Select the correct statement.
82easy1 markmcq
Which one of the following is the most abundant protein in the animals?
83medium1 markmcq
Experimental verification of the chromosomal theory of inheritance was done by:
84hard1 markmcq
Match the following columns and select the correct option.| Column - I | Column - II || :--- | :--- || (a) Floating Ribs | (iv) Do not connect with the sternum || (b) Acromion | (iii) Clavicle || (c) Scapula | (i) Located between second and seventh ribs || (d) Glenoid cavity | (ii) Head of the Humerus |
85medium1 markmcq
The number of substrate level phosphorylations in one turn of citric acid cycle is:
86medium1 markmcq
Dissolution of the synaptonemal complex occurs during:
87medium1 markmcq
Bilaterally symmetrical and acoelomate animals are exemplified by:
88medium1 markmcq
The body of the ovule is fused within the funicle at:
89medium1 markmcq
Goblet cells of alimentary canal are modified from:
90easy1 markmcq
Snow-blindness in Antarctic region is due to:
91medium1 markmcq
Identify a molecule which does not exist.
92medium1 markmcq
Find out the solubility of in . Given that the ionic product of is .
93medium1 markmcq
Identify the correct statements from the following:(a) is used as refrigerant for ice-cream and frozen food.(b) The structure of contains twelve six carbon rings and twenty five carbon rings.(c) , a type of zeolite, is used to convert alcohols into gasoline.(d) is colorless and odourless gas.
94hard1 markmcq
Hydrolysis of sucrose is given by the following reaction:

If the equilibrium constant () is at , the value of at the same temperature will be:
95hard1 markmcq
Identify compound X in the following sequence of reactions:
image
96easy1 markmcq
Identify the incorrect match.| Name | IUPAC Official Name || :--- | :--- || (a) Unnilunium | (i) Mendelevium || (b) Unniltrium | (ii) Lawrencium || (c) Unnilhexium | (iii) Seaborgium || (d) Unununnium | (iv) Darmstadtium |
97medium1 markmcq
An element has a body centered cubic (bcc) structure with a cell edge of . The atomic radius is:
98medium1 markmcq
Which of the following set of molecules will have zero dipole moment?
image
99medium1 markmcq
On electrolysis of dil. sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:
100medium1 markmcq
Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give:
101easy1 markmcq
Which of the following oxoacid of sulphur has linkage?
102medium1 markmcq
Which of the following amine will give the carbylamine test?
image
103medium1 markmcq
The calculated spin only magnetic moment of ion is:
104medium1 markmcq
The correct option for free expansion of an ideal gas under adiabatic condition is:
105medium1 markmcq
The freezing point depression constant () of benzene is . The freezing point depression for the solution of molality containing a non-electrolyte solute in benzene is (rounded off upto two decimal places):
106medium1 markmcq
The number of Faradays() required to produce of calcium from molten (Atomic mass of ) is:
107medium1 markmcq
Reaction between benzaldehyde and acetophenone in presence of dilute is known as:
108easy1 markmcq
Paper chromatography is an example of:
109medium1 markmcq
An increase in the concentration of the reactants of a reaction leads to change in:
110medium1 markmcq
A mixture of and gases in a cylinder contains of and of . If the total pressure of the mixture of the gases in the cylinder is , the partial pressure of is:[Use atomic masses (in ): ]
111easy1 markmcq
Identify the correct statement from the following:
112medium1 markmcq
A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?
113easy1 markmcq
Which of the following is a cationic detergent?
114medium1 markmcq
Elimination reaction of 2-Bromo-pentane to form pent-2-ene is:(a) -Elimination reaction(b) Follows Zaitsev rule(c) Dehydrohalogenation reaction(d) Dehydration reaction
115medium1 markmcq
The mixture which shows positive deviation from Raoult’s law is:
116medium1 markmcq
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?
117easy1 markmcq
Which of the following is a basic amino acid?
118medium1 markmcq
was passed through a solution of , and . Which of the following compound(s) crystallise(s)?
119easy1 markmcq
Which of the following is a natural polymer?
120easy1 markmcq
Which of the following is not correct about carbon monoxide?
121easy1 markmcq
Sucrose on hydrolysis gives:
122medium1 markmcq
The following metal ion activates many enzymes, participates in the oxidation of glucose to produce and with , is responsible for the transmission of nerve signals.
123medium1 markmcq
Which one of the followings has maximum number of atoms?
124easy1 markmcq
The number of protons, neutrons and electrons in , respectively, are:
125medium1 markmcq
What is the change in oxidation number of carbon in the following reaction?
126hard1 markmcq
Identify the incorrect statement.
127medium1 markmcq
For the reaction, , the correct option is:
128medium1 markmcq
Measuring Zeta potential is useful in determining which property of colloidal solution?
129hard1 markmcq
Urea reacts with water to form which will decompose to form . when passed through , deep blue colour solution is formed. What is the formula of from the following?
130medium1 markmcq
Match the following and identify the correct option.| Column - I | Column - II || :--- | :--- || (a) | (iii) Synthesis gas || (b) Temporary hardness of water | (i) || (c) | (ii) An electron deficient hydride || (d) | (iv) Non-planar structure |
131medium1 markmcq
Match the following:| Oxide | Nature || :--- | :--- || (a) | (ii) Neutral || (b) | (i) Basic || (c) | (iv) Amphoteric || (d) | (iii) Acidic |
132hard1 markmcq
The rate constant for a first order reaction is . The time required to reduce of the reactant to is:
133hard1 markmcq
An alkene on ozonolysis gives methanal as one of the product. Its structure is:
image
134easy1 markmcq
Which of the following alkane cannot be made in good yield by Wurtz reaction?
135hard1 markmcq
Anisole on cleavage with gives:
image
136easy1 markmcq
For which one of the following, Bohr model is not valid?
137easy1 markmcq
The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: ( =speed of electromagnetic waves)
138medium1 markmcq
The Brewsters angle for an interface should be:
139medium1 markmcq
A cylinder contains hydrogen gas at pressure of and temperature . Its density is: ()
140medium1 markmcq
A ray is incident at an angle of incidence on one surface of a small angle prism (with angle of prism ) and emerges normally from the opposite surface. If the refractive index of the material of the prism is , then the angle of incidence is nearly equal to:
141hard1 markmcq
Two cylinders and of equal capacity are connected to each other via a stop cock. contains an ideal gas at standard temperature and pressure. is completely evacuated. The entire system is thermally insulated. The stop cock is suddenly opened. The process is:
142easy1 markmcq
The energy equivalent of of a substance is:
143medium1 markmcq
A body weighs on the surface of the earth. What is the gravitational force on it, at a height equal to half the radius of the earth?
144easy1 markmcq
The solids which have the negative temperature coefficient of resistance are:
145easy1 markmcq
The phase difference between displacement and acceleration of a particle in a simple harmonic motion is:
146easy1 markmcq
A screw gauge has least count of and there are divisions in its circular scale. The pitch of the screw gauge is:
147medium1 markmcq
In a guitar, two strings and made of same material are slightly out of tune and produce beats of frequency . When tension in is slightly decreased, the beat frequency increases to . If the frequency of is , the original frequency of will be:
148medium1 markmcq
Two particles of mass and respectively are attached to the two ends of a rigid rod of length with negligible mass. The centre of mass of the system from the particle is nearly at a distance of:
149medium1 markmcq
Find the torque about the origin when a force of acts on a particle whose position vector is .
150medium1 markmcq
Light with an average flux of falls on a non-reflecting surface at normal incidence having surface area . The energy received by the surface during time span of is:
151medium1 markmcq
A spherical conductor of radius has a charge of distributed uniformly. What is the magnitude of electric field at a point from the centre of the sphere?()
152easy1 markmcq
In a certain region of space with volume , the electric potential is found to be throughout. The magnitude of electric field in this region is:
153easy1 markmcq
The increase in the width of the depletion region in a p-n junction diode is due to:
154medium1 markmcq
A capacitor is connected to a , ac supply. The rms value of the current in the circuit is, nearly:
155easy1 markmcq
The mean free path for a gas, with molecular diameter and number density can be expressed as:
156easy1 markmcq
For transistor action, which of the following statements is correct?
157medium1 markmcq
Light of frequency times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?
158easy1 markmcq
When a uranium isotope is bombarded with a neutron, it generates , three neutrons and:
159medium1 markmcq
The energy required to break one bond in DNA is . This value in is nearly:
160medium1 markmcq
Two bodies of mass and are tied to the ends of a massless string. The string passes over a pulley which is frictionless. The acceleration of the system in terms of acceleration due to gravity () is:
image
161medium1 markmcq
A wire of length , area of cross section is hanging from a fixed support. The length of the wire changes to when mass is suspended from its free end. The expression for Young’s modulus is:
162easy1 markmcq
The average thermal energy for a mono-atomic gas is: ( is Boltzmann constant and , absolute temperature)
163easy1 markmcq
Which of the following graph represents the variation of resistivity () with temperature () for copper?
image
image
164medium1 markmcq
The color code of a resistance is given as: Yellow, Violet, Brown, Gold. The values of resistance and tolerance, respectively, are:
image
165medium1 markmcq
In Young’s double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:
166hard1 markmcq
The capacitance of a parallel plate capacitor with air as medium is . With the introduction of a dielectric medium, the capacitance becomes . The permittivity of the medium is:()
167easy1 markmcq
Dimensions of stress are:
168medium1 markmcq
Assume that light of wavelength is coming from a star. The limit of resolution of telescope whose objective has a diameter of is:
169hard1 markmcq
A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is . If instead C is removed from the circuit, the phase difference is again between current and voltage. The power factor of the circuit is:
170hard1 markmcq
A short electric dipole has a dipole moment of . The electric potential due to the dipole at a point at a distance of from the centre of the dipole, situated on a line making an angle of with the dipole axis is:()
171medium1 markmcq
An iron rod of susceptibility is subjected to a magnetising field of . The permeability of the material of the rod is:()
172medium1 markmcq
A long solenoid of length having turns carries a current of . The magnetic field at the centre of the solenoid is:()
173medium1 markmcq
A charged particle having drift velocity of in an electric field of , has a mobility in of:
174hard1 markmcq
The quantities of heat required to raise the temperature of two solid copper spheres of radii and () through are in the ratio:
175medium1 markmcq
An electron is accelerated from rest through a potential difference of volt. If the de Broglie wavelength of the electron is , the potential difference is:
176easy1 markmcq
Taking into account of the significant figures, what is the value of ?
177medium1 markmcq
A ball is thrown vertically downward with a velocity of from the top of a tower. It hits the ground after some time with a velocity of . The height of the tower is: ()
178medium1 markmcq
A capillary tube of radius is immersed in water and water rises in it to a height . The mass of the water in the capillary is . Another capillary tube of radius is immersed in water. The mass of water that will rise in this tube is:
179hard1 markmcq
A resistance wire connected in the left gap of a metre bridge balances a resistance in the right gap at a point which divides the bridge wire in the ratio . If the length of the resistance wire is , then the length of of the resistance wire is:
180easy1 markmcq
For the logic circuit shown (two NAND gates), the truth table is:
image
image

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