Max. Mark : 360
Time :1.30 Min.
Subject: Biology
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This Booklet contains 08 Pages.
NTA MODEL PAPER-1
NEET 2020 Test Booklet Code - P
NTA MODEL PAPER-1 2 TEST BOOKLET CODE - P
01. Which of the following statement is true regarding the
role of acetylcholine in nerve physiology?
(1) It increases the selective permeability of the cell
membrane
(2) It increases the potassium concentration inside the
axon
(3) It reduces activity of Na-K pump
(4) It increases the sodium concentration outside the
axon
02. A bicollateral vascular bundle is characterized by
(1) Phloem surrounded on both sides by xylem
(2) Transverse splitting of vascular bundle
(3) Longitudinal splitting of vascular bundle
(4) Xylem surrounded on both sides by phloem
03. A few statements describing certain feature of
reproduction are given below:
i. Gametic fusion takes place.
ii. Transfer of genetic material take place.
iii. The reduction division takes place.
iv. Progeny has a resemblance to parents.
Select the option that are true for both asexual and
sexual reproduction.
(1) i and ii (2) ii and iii
(3) ii and iv (4) i and iii
04. Rot does not help in the absorption of water in which
of the following plant?
(1) Pistia (2) Pea
(3) Wheat (4) Sunflower
05. Artificial induction of roots on stems before it is
separated from the parent plant for propagation is
called
(1) cutting
(2) layering
(3) plant tissue culture
(4) grafting
06. Generally, the number of integuments in the ovule f
angiosperms and gymnosperms is
(1) One and two (2) One and one
(3) Two and one (4) Two and two
07. Cartilage is formed by
(1) Osteoblasts (2) Chondrocytes
(3) Fibroblasts (4) Epithelium
08. The leghaemoglobin that imparts pink-red colour to the
root nodules is located in
(1) The wall of bacteria
(2) The wall of host cell
(3) The cytoplasm f host cell
(4) Between bacteroids and surrounding
09. A fall in glomerular filtration rate (GFR) activates
(1) Adrenal cortex to release aldosterone
(2) Adrenal medulla to release adrenaline
(3) Juxta-glomerular cells to release renin
(4) Posterior pituitary to release vasopressin
10. Ephemerals are xerophytes that are
(1) Drought resisting (2) Drought enduring
(3) Drought escaping (4) None of these
11. What is true about Bt toxin?
(1) Bt protein exists as active toxin in the Bacillus
(2) The activated toxin enters the ovaries of the pest
to sterilize it and thus prevent its multiplication.
(3) The concerned Bacillus has antitoxins.
(4) The inactive protoxin gets converted into an active
form in the insect gut.
12. Identify the wrong statement regarding post-fertilization
development?
(1) The ovary wall develops in pericarp
(2) The outer integument of the ovule develops into a
tegmen
(3) The fusion nucleus (triple nucleus ) develops into
endosperm
(4) The ovule develops into seed
13. Selaginella has a tendency to from seed, called seed
habit because it follows
(1) Retention of megaspore permanently inside the
megasporangium
(2) Heterospory
(3) Both (A) and (B)
(4) None of the above
14. Cytokinin was first discovered by
(1) Skoog and Miller
(2) Boyer
(3) Benson and Calvin
(4) Went
15. The term surrogate mother is used for
(1) Induction of lactation
(2) Artificially inseminated female
(3) Future mother with transplanted embryo
(4) Mother who provides ovum
16. Which of the following palindromic sequence is
recognized by EcoRl?
(1) (2)
(3) (4)
NTA MODEL PAPER-1 3 TEST BOOKLET CODE - P
17. Removal of calcium from freshly collected blood would
(1) Cause delayed clotting
(2) Prevent Clotting
(3) Cause immediate clotting
(4) Prevent destruction of haemoglobin
18. Synapsis is pairing of
(1) Any two chromosomes
(2) Non homologous chromosomes
(3) Acentric chromosomes
(4) Homologous chromosomes
19. The endometrium is found in
(1) Placenta of mammals
(2) Nipple of mammals
(3) Uterus of mammals
(4) None of these
20. Consider the statements given below regarding
contraception and answer as directed thereafter.
1. Medical termination of pregnancy (MTP) during
the first trimester is generally safe.
2. Generally, chance of conception are nil until the
Mother breast-feeds the infant for up to two years.
3. Intrauterine devices like copper-T-are effective
contraceptives.
4. Emergency contraceptive pills may be taken up to
one week after coitus to prevent conception.
Which two of the above statements are incorrect?
(1) 1 and 2 (2) 2 and 3
(3) 3 and 4 (4) 2 and 4
21. When succinyl - CoA is converted into succinic acid,
the energy-storing compound formed is
(1) ADP (2) GDP
(3) AMP (4) GTP
22 Find the incorrect pair.
(1) Bowman’s capsule- Glomerular filtration
(2) PCT-Absorption of Na+ and K+
(3) DCT-Absorption of glucose
(4) None of these
23. Which part of the human brain controls the urge for
eating and drinking?
(1) Forebrain (2) Midbrain
(3) Hindbrain (4) Spinal cord
24. The haploid cell which divides by mitosis to form
embryosac is
(1) Megaspore mother cell
(2) Microspore mother cell
(3) Functional megaspore
(4) Non-functional megaspore
25. The most common indicator organism that represents
polluted water is
(1) E.coli (2) P.typhi
(3) C. vibrio (4) Entamoeba
26. A DNA strand is directly in the synthesis of all of the
following, except
(1) Anther DNA (2) Protein synthesis
(3) tRNA molecule (4) mRNA molecule
27. In Bryophytes, antherozoids are
(1) Biflagellate
(2) Multiflagellate
(3) Sometimes biflagellate and sometimes
multiflagellate
(4) Biflagellate in a few species and multiflagellate in
the rest
28. Lichens are ecologically important as they
(1) Purify air
(2) Are pioneers of barren rocks
(3) Are symbionts of algae and fungi
(4) Are associated with mycorrhizal roots
29. The loosely arranged non-chlorophyllous parenchyma
cells present in lenticels are called
(1) Complementary cells
(2) Passage cells
(3) Water stomata
(4) Albuminous cells
30. By the use of biotechnology, the production of B2
vitamins has been increased to about 20,000 time in
which of the following organism?
(1) Ashbya gossypii
(2) Escherichia coli
(3) Pseudomonas denitrificans
(4) Propionibacterium shemanii
31. The role bacteria in carbon cycle is
(1) Photosynthesis
(2) Chemosynthesis
(3) Decomposition of organic compounds
(4) Evolution of O2
32. Which of the following is the closest relative of man?
(1) Chimpanzee (2) Gorilla
(3) Orangutan (4) Gibbon
33. For transformation with recombinant DNA, the
bacterial cells must first be made competent which
means
(1) Should increase their metabolic reactions
(2) Should decrease their metabolic reactions
(3) Increase efficiency with Which DNA enters the
bacterium
(4) Ability to divide fast
34. If a colour blind woman marries a normal visioned man,
their sons will be
(1) One-half colour blind and one-half normal
(2) Three-fourth colour blind and one fourth normal
(3) All clolour blind
(4) All normal visioned
35. If both ovaries are removed from the rat, the
concentration of which hormone is decreased in blood?
(1) Oxytocin
(2) Prolactin
(3) Estrogen
(4) Gonadotropin releasing factor
NTA MODEL PAPER-1 4 TEST BOOKLET CODE - P
36. Which of the following crops has been brought to India
from the new world?
(1) Cashewnut, potato, rubber
(2) Mango, tea
(3) Tea, rubber, mango
(4) Coffee
37. Botanical name of cauliflower is
(1) Brassica oleracea var. capitata
(2) Brassica campesteris
(3) Brassica oleracea var, botrytis
(4) Brassica oleracea var.gemmifera
38. One the basis of symptoms of chlorosis in leaves, a
student inferred that this was due to the deficiency of
nitrogen. This inference could be correct only if we
assume that yellowing of leaves appeared first in
(1) Old leaves
(2) Young leaves
(3) Young leaves followed by mature leaves
(4) Young leaves followed by older leaves
39. If the total amount of adenine and thymine in doublestranded
DNA is 60%, then the amount of guanine in
this DNA Will be
(1) 15% (2) 20%
(3) 30% (4) 40%
40. Vector for ‘Kala azar’ disease is
(1) Sand fly (2) House fly
(3) Louse (4) Bed bug
41. Restriction endonucleases are enzymes which
(1) Cuts at specific positions within the DNA molecule
(2) Recognize a specific nucleotide sequence for
binding of DNA ligase
(3) Restrict the action of the enzyme DNA polymerase
(4) Remove nucleotides from the ends of the DNA
molecule
42. The first line of defence is
(1) Antibodies (2) WBC
(3) Skin (4) Liver
43. Which of the following papillae are without taste bud
in the human tongue?
(1) Vallate (2) Fungiform
(3) Fusiform (4) Filiform
44. According to the chemiosmotic mechanism for ATP
synthesis, the force\factor responsible for ATP
synthesis is
(1) Membrane potential across membrane
(2) Proton motive force
(3) Electromotive force
(4) Redox potential
45. Convergent evolution is illustrated by
(1) Dogfish and whale
(2) Rat and dog
(3) Bacterium and protozoan
(4) Starfish and cuttle fish
46. In the human body, which one of the following is
anatomically correct?
(1) Collar bones – 3 pairs
(2) salivary glands – 1 pairs
(3) Cranial nerves – 10 pairs
(4) Floating ribs – 2 pairs
47. Site of attachment of spindle fibres in chromosome
lies
(1) One the sides of centromere
(2) After secondary constriction
(3) Near telomere
(4) Within centromere
48. What will happen if ligament are cut or broken?
(1) Bones will move freely at joints
(2) No movement at joints
(3) Bones will become unfix
(4) Bones will become fixed
49. Biogas contains
(1) 30%-40% methane
(2) 50%-70% Co2
(3) 50%-70% methane
(4) 20% methane
50. Select the correct statement related to flowering in
plants.
i. Some plants require a periodic exposure to light to
induce flowering
ii. The flowering is either quantitatively or qualitatively
dependent on exposure to low temperature.
iii. The site of perception of light/dark duration is the
stem apex.
iv. Flowering in plants is due to the hormones
produced in the shoot apex.
(1) i, ii, and ii are correct
(2) i and ii are correct
(3) i, ii, and iv are correct
(4) All are correct
51. Which statement is not true for binomial system of
nomenclature?
(1) Biological names are general in Latin or Latinised
or derived from Latin irrespective of their origin
(2) The first word in a biological name represents the
species while the second word denotes the genus.
(3) The first word of biological name starts with capital
letter and the first letter of second word starts with
small letter
(4) Name of the author is written in abbreviated form
after the specific epithet
52. Air layering is performed in case of
(1) Jasmine (2) Grapevine
(3) Gooseberry (4) Litchi
53. Blood group AB has
(1) No antigen
(2) No antibody
(3) Neither antigen nor antibody
(4) Both antigen and antibody
NTA MODEL PAPER-1 5 TEST BOOKLET CODE - P
54. Which of the following is a flowering plant with nodules
containing filamentous nitrogen-fixing microorganisms?
(1) Casuarina equisetifolia
(2) Crotalaria Juncea
(3) Cycas revoluta
(4) Cicer arietinum
55. The mammary gland is a modification of
(1) Sweat gland (2) Salivary gland
(3) Lacrimal gland (4) None of these
56. Which of the following plant material is widely used in
the preparation of the culture medium?
(1) Pinus longifolia
(2) Cocos nucifera
(3) Borassus flabellifer
(4) Cycas revoluta
57. Which of the following show higher rate of respiration?
(1) Collenchyma (2) Leaf
(3) Dry seeds (4) Germinating seeds
58. The main function of lacteals in the human small
intestine is the absorption of
(1) glucose and vitamins
(2) Amino acids and glucose
(3) water and vitamins
(4) Fatty acids and glycerol
59. Hammerling’s experiments of Acetabularia involved
exchanging of
(1) Cytoplasm (2) Nucleus
(3) Rhizoid and stalk (4) Gametes
60. Alpha diversity is biodiversity present
(1) Within community
(2) Between community
(3) Ranges of communities
(4) all the above
61. Ranthambre National Park is situated in
(1) Maharashtra (2) Rajasthan
(3) Gujarat (4) U.P.
62. Mycorrhiza is a symbiotic association between
(1) Bacteria and fungi
(2) Algae and fungi
(3) Fungi and roots of higher plants
(4) Blue green algae and roots of higher plants
63. Adrenaline directly affects on
(1) S.A. node
(2) -cells of Langerhans
(3) The dorsal root of spinal cord
(4) Epithelial cells of stomach
64. Which is the correct pair for an edible part?
(1) tomato-Thalamus
(2) Maize-Cotyledons
(3) Guava-Pericarp
(4) Date palm-Mesocarp
65. Reproducing new plants by cells instead of seeds is
known as
(1) Mutation (2) Tissue culture
(3) Antibiotics (4) Biofertilizer
66. Who discovered “ribosomes” in animal cells?
(1) Watson (2) Temin
(3) Chaudhary (4) Palade
67. GIFT involves a transfer of
(1) A mixture of sperms and ova into the uterus
(2) Embryo into the uterus
(3) A mixture of sperms and ova into the fallopian tube
(4) zygote into the fallopian tube
68. Contractile vacuole of Amoeba placed in salt water
will
(1) Burst (2) Disappear
(3) Enlarge (4) Multiply
69. Eutrophication is caused by
(1) Phosphate rocks only
(2) Agricultural fertilizers only
(3) Sewage and phosphate rocks
(4) Sewage and agricultural fertilizers
70. When you hold your breath, which of the following
gas changes inblood would first lead to the urge to
breathe?
(1) Falling O2 concentration
(2) Rising CO2 concentration
(3) Falling CO2 concentration
(4) Rising CO2 and falling O2 concentration
71. Weberian ossicles are found in
(1) Frogs (2) Snakes
(3) Fishes (4) Birds
72. In Drosophila, the allele for normal grey body colour
(G) is dominant to the ebony body (g). The following
table summarises the results of several crosses:
Cross Result
Strain 1× gg All Grey type
Strain 2 × gg 1 Grey : 1 ebony
Strain 3 × gg All ebony type
Strain 4 × Gg 3 Grey : 1 ebony
Which strains have the genotype Gg?
(1) 1 and 3 (2) 1 and 4
(3) 2 and 3 (4) 2 and 4
73. Which type of mouthparts is present on the lateral side
of the pre-oral cavity in cockroach?
(1) Labrum and mandibles
(2) Mandibles and labium
(3) Mandibles and 1st maxillae
(4) Mandibles and hypopharynx
NTA MODEL PAPER-1 6 TEST BOOKLET CODE - P
74. The biomass available for consumption by the
herbivores and the decomposers is called
(1) Net primary productivity
(2) Secondary productivity
(3) Standing crop
(4) Gross primary productivity
75. Which of the following wavelength of light is absorbed
maximum for photosynthesis?
(1) Red light (2) Blue light
(3) Green light (4) Yellow light
76. Cytochrome oxidase contain
(1) Fe (2) Hg
(3) Co (4) Mo
77. Tetanolysin is produced by
(1) Mycobacterium leprae
(2) Clostridium botulinum
(3) Clostridium tetani
(4) None of these
78. What is true about Nereis, scorpion, cockroach and
silver-fish?
(1) They all possess a dorsal heart
(2) None of them is aquatic
(3) They all belong to the same phylum
(4) They all have jointed paired appendages
79. Passive absorption of water is related to all, except
(1) Apoplastic pathway
(2) Transpiration pull plays the major role
(3) Development of a positive pressure in xylem
(4) Water absorption through the roots
80. Emerson’s enhancement effect and Red drop have
been instrumental in the discovery of:
(1) Photophosphorylation and non – cyclic electron
transport
(2) Two photosystems operating simultaneously
(3) Photophosphorylation and cyclic electron transport
(4) Oxidative phosphorylation
81. Biopiracy means
(1) Use of biopatents
(2) Thefts of plants and animals
(3) Staling of bio resources
(4) Exploitation of bio resources without authentic
permission
82. The chief water conducting elements of xylem in
gymnosperms are
(1) Vessels
(2) Fibers
(3) Transfusion tissue
(4) Tracheids
83. When a cell is plasmolysed, it becomes
(1) Flaccid and its TP become zero
(2) Turgid and its becomes zero
(3) Turgid and TP become equal to OP
(4) Flaccid and DPO become zero
84. Khorana got the Nobel Prize for
(1) t-RNA
(2) Genetic code
(3) Carbohydrate metabolism
(4) Protein synthesis
85. Gause’s Principle of competitive exclusion states that:
(1) More abundant species will exclude the less
abundant species through competition
(2) Competition for the same resources excludes
species having different food preference
(3) No two species can occupy the same niche
indefinitely for the same limiting resources
(4) Large organism exclude smaller ones through
competition
86. In tissue culture medium, the embryoids formed from
pollen grains is due to
(1) Cellular totipotency
(2) Organogenesis
(3) Double fertilisation
(4) Test – tube culture
87 The embryo of man is protected by
(1) Amniotic cavity
(2) Peritoneal cavity
(3) Pleural cavity
(4) Allantois
88. Select the correct statement regarding protein
synthesis.
(1) When the small subunit of the ribosome encounters
an mRNA the process of translation begins
(2) Peptidase catalyses the formation of peptide bond
(3) UTRs are present between the start codon and
stop codon
(4) At the end of translation the release factor binds
to the initiation codon
89. Chloride shift occurs in response to
(1) HCO¯
3 (2) K+
(3) H+ (4) Na+
90. An antiviral chemical produced by the animal cell is
(1) Virion (2) Interferon
(3) Repressor protein (4) Hormone
Answer Key in Next post....
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