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2. NEET Sample Question Paper for Biology
2
SET−1
Roll No.
NEET (AIPMT) 2018
Sample Question Paper
BIOLOGY (Theory)
General Instructions
(i) This test consists of 90 question.
(ii) Each question is allotted 4 marks for correct response.
(iii) Candidates will be awarded marks as stated above in instruction no. 2
for correct response of each question. 1 mark will be deducted for
indicating incorrect response of each question. No deduction from the
total score will be made if no response is indicated for an item in the
answer sheet.
(iv) There is only one correct response for each question. Filling up more
than one response in any question will be treated as wrong response and
marks for wrong response will be deducted according as per
instructions.
1. Serotonin and melatonin are hormones secreted by
(a) pancreas
(b) pineal body
(c) pituitary gland
(d) thymus

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2. Organs of Jacobson’ helps in
(a) touch
(b) vision
(c) smell
(d) hear
3. Which type of teeth are found in human?
(a) Acrodont
(b) Thecodont
(c) Polyphydont
(d) Monophyodont
4. Which pigment is involved in photoperiodic changers in plants
(a) Phytochrome
(b) Cytochrome
(c) Chlorophyll
(d) Anthocyanin
5. If a cells with a solute potential of –0.2 MPa and a pressure potential of 0.4 MPa is
placed in a chamber filled with pure water that is pressurised with 0.5 MPa what is
likely to happen
(a) water will flow out of the cell
(b) water will flow into the cell
(c) cell wall will be crushed
(d) the cell will explode
6. What was the most significant trend in the evolution of modern man (Homo sapiens)
from his ancestors?
(a) Shorting of jaws
(b) Binocular vision
(c) Increasing brain capacity
(d) Upright posture
7. The number of stomata and epidermal cells in 1 mm 2
leaf area of lower epidermis of
the level of X, Y and Z plants are given below. Arrange the plants in decreasing order
of their stomatal index.
Plant Number of stomata Number of epidermal cell
X 30 150
Y 60 240
Z 90 400
(a) X, Y and Z
(b) Y, Z and X
(c) Z, Y and X
(d) Y, X and Z

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8. Achilles tendon is associated with
(a) gluteus muscle
(b) hamstring muscle
(c) quadriceps muscle
(d) gastrocnemius muscle
9. The organelle which consists of enzymes such as catalase, urease, oxidase, luciferase,
etc., and involved in a waste process is ........ .
(a) peroxisomes
(b) lysosomes
(c) lomasomes
(d) None of these
10. During mitosis, nuclear membrane disappear at
(a) telophase
(b) prophase
(c) metaphase
(d) anaphase
11. Which one of the following shows, the hierarchial arrangement of taxonomic categories
of plants in descending order ?
(a) (b) (c) (d)
Kingdom
↑
Kingdom
↑
Kingdom
↓
Kingdom
↓
Division
↑
Division
↑
Division
↓
Division
↓
Class
↑
Order
↑
Order
↓
Class
↓
Order
↑
Class
↑
Class
↓
Order
↓
Family
↑
Family
↑
Family
↓
Family
↓
Species
↑
Genus
↑
Genus
↓
Genus
↓
Genus Species Species Species
12. Floral characters are the basis of classification because
(a) they are more conserved
(b) they are variously pigmented
(c) they can be preserved for longer times
(d) All of the above

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13. A particular odour that prevails in marshy areas and cow-sheds is on account of gas
produced by
(a) mycoplasma
(b) archaebacteria
(c) slime moulds
(d) cyanobacteria
14. Pecten, a com-like structure is found in the eye of
(a) fishes
(b) frogs
(c) birds
(d) mammals
15. Which one of the following human cells do not contain mitochondria?
(a) Nerve cell
(b) Red blood cells
(c) Liver cell
(d) White blood cells
16. Consider the given figure.
Chlorophyllus
organismAchlorophyllus
organism
A
C
B
Which of the following option is correct for the labels A to C ?
A B C
(a) Fungi Plants Animals
(b) Monera Fungi Protista
(c) Animals Protista Plants
(d) Plants Monera Animals
17. In C-plants, the carbon dioxide fixation occurs in
(a) guards cells
(b) spongy cells
(c) palisade cells
(d) bundle sheath cells

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18. How many Calvin cycles are required to produce 5 molecules of glucose?
(a) 60
(b) 15
(c) 30
(d) 90
19. Complete the analogy
viroids : citrus exocortis : : Prions : ?
(a) Kuru disease
(b) AIDS
(c) polio
(d) Mumps
20. Which one of the following statements is not correct with respect to malaria ?
(a) RBCs rupture and release haemozoin which causes chills
(b) Sporozoites multiply in blood
(c) Female Anopheles mosquito is the vector
(d) Malignant malaria is caused is caused by Plasmodium falciparum
21. The difference between rough endoplasmic reticulum and smooth endoplasmic reticulum
is that rough endoplasmic reticulum
(a) does not contain ribosomes
(b) contains ribosomes
(c) does not transport proteins
(d) transport proteins
22. Which of the two statements together support that respiratory pathway is an ‘amphibolic
pathway’?
I Fats breakdown to glycerol and fatty acids, subsequently yielding acetyl Co-A.
II In respiration C−C bonds of complex compounds breakdown through oxidation leads
to release of energy.
III Acetyl Co-A from respiratory pathway is withdrawn for synthesis of fatty acids.
IV Proteins are degraded by protease to amino acids and enter the respiratory pathway.
Codes
(a) I and II
(b) I and IV
(c) II and IV
(d) I and III

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23. Which is the following matching pairs is incorrect ?
(a) Mollusca – Pseudocoel
(b) Cnidaria – Nematocyst
(c) Annelida – Chloragogen cells
(d) Echinodermata – Water vascular system
24. In which stage of meiotic prophase-I, chromosomes become thread-like and visible?
(a) Diakinesis
(b) Leptotene
(c) Zygotene
(d) Pachytene
25. A somatic cell that has just complained the S-phase of its cell cycle, as compared to
gamete of the same species has
(a) twice the number of chromosomes, and twice the amount of DNA
(b) same number of chromosomes, but twice the amount of DNA
(c) twice the number of chromosomes and four times the amount of DNA
(d) four times the number of chromosomes and twice the amount of DNA
26. Which of the following is the most accepted theory for movement of water through
plants?
(a) Cohesion theory
(b) Capillarity
(c) Passive transport
(d) Root pressure
27. The kind of coelom represented in the diagram is characteristic of
Ectoderm
Endoderm
Mesoderm
(a) earthworm
(b) cockroach
(c) roundworm
(d) tapeworm

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28. Insectivorous plants live in a soil that is usually deficient in
(a) nitrogen
(b) chloride
(c) potassium
(d) magnesium
29. Which of the following, matches correctly?
(a) Inferior vena cava – Receives deoxygenated blood from the head and body
(b) Superior vena cava – Receives deoxygenated blood from the lower body and
organs
(c) Pulmonary artery – Carries deoxygenated blood to the lungs
(d) Hepatic artery – Carries deoxygenated blood to the gut
30. Choose the correct statement.
(a) Stroke rate volume multiplied by cardiac output gives heart rate
(b) Heart rate multiplied by cardiac uot put gives the stoke volume
(c) Cardiac output divided by heart rate gives the stroke volume
(d) Stroke volume divided by heart rate gives the cardiac output
31. The natural plant hormone isolated from corn kernels and coconut milk is
(a) florigen
(b) GA3
(c) free auxins
(d) zeatin
32. What is the pO2 and pCO2 in the systemic arteries?
(a) pO2 40 mm Hg; pCO2 45 mm Hg
(b) pO2 95 mm Hg; pCO2 40 mm Hg
(c) pO2 40 mm Hg; pCO2 40 mm Hg
(d) pO2 45 mm Hg; pCO2 40 mm Hg
33. Yeast like budding of Oidia in Mucor/Rhizopus is called
(a) torula stage
(b) chantransia
(c) palmella stage
(d) gongrosira
34. Which one is the following is a primitive gymnosperm that produces motile sperms,
bears ovulate and microsporangiate cones on different plants and has foul-smelling,
fleshy seeds?
(a) Pinus
(b) Cycas
(c) Ginkgo
(d) Gnetum

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35. Lysozyme that is present in saliva and tears destroys
(a) certain fungi
(b) certain types of bacteria
(c) all viruses
(d) most virus infected cells
36. The space between the plasma membrane and the cell wall of a plasmolysed cell
surrounded by a hypertonic solution is occupied by the
(a) hypotonic solution
(b) isotonic solution
(c) hypertonic solution
(d) water
37. A small protein attached to the outer surface of the inner membrane and which acts as
a mobile carrier for transfer of electrons between complex III and IV is
(a) cytochrome-d
(b) cytochrome-c
(c) cytochrome-b
(d) cytochrome-a
38. If for some reason the parietal cells of the gut epithelium become partially
non-functional, what is likely to happen?
(a) The pancreatic enzymes and specially the trypsin and lipase will not work
efficiently
(b) The pH of stomach will fall abruptly
(c) Steapsin will be more effective
(d) Proteins will not be adequately hydrolysed by pepsin into proteoses and peptones
39. Which segment of renal tubule is permeable to water but nearly impermeable to salts?
(a) Descending limp impermeable to salts?
(b) Proximal convoluted tubule
(c) Ascending limp of Henle’s loop
(d) Distal convoluted tubule
40. Arrange the following in the order of increasing volume.
I. Tidal volume
II. Residual volume
III. Expiratory reserve volume
IV. Vital capacity
(a) I < II < III < IV
(b) I < III < II < IV
(c) I < IV < III < II
(d) I < IV < II < III

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41. The increase in blood flow to heart stimulates secretion of
(a) renin
(b) oxytocin
(c) antidiuretic hormone
(d) atrial natriuretic factor
42. Choose the correct statement.
(a) The two condyles present at the distal end of femur are separated by intercondylar
fossa
(b) The shank region consists of tarsals and metatarsals
(c) Almost 17 bones from toe
(d) Patella is the largest bone among ethamoid bones
43. Body having meshwork of cells, internal cavities lined with food filtering flagellated
cells and indirect developing are the characteristics of phylum
(a) Coelenterata
(b) Porifera
(c) Mollusca
(d) Protozoa
44. Perianth is represented by
(a) glums
(b) lemma
(c) lodicules
(d) palea
45. In Nepenthes (pitcher plant), pitcher is the modification of
(a) petiole
(b) base
(c) lamina
(d) All of these
46. Which of the following is not a conjugated protein?
(a) Peptone
(b) phosphoprotein
(c) Lipoprotein
(d) Chromoprotein

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47. A population of genetically identical individuals, obtained from asexual reproduction is
(a) callus
(b) clone
(c) deme
(d) aggregate
48. DDT residues are rapidly passed through food chain causing biomagnification because
DDT is
(a) lipo soluble
(b) moderately toxic
(c) non-toxic to aquatic animals
(d) water soluble
49. Which of the following ecosystem types has the highest annual net primary
productivity?
(a) Tropical rain forest
(b) Tropical deciduous forest
(c) Temperate evergreen forest
(d) Temperate deciduous forest
50. A nitrogen-fixing microbe associated with Azolla in rice fields is
(a) Spirulina
(b) Anabaena
(c) Frankia
(d) Tolypothrix
51. Which of the following Bt crops is being grown in India by the farmers?
(a) Maize
(b) Cotton
(c) Brinjal
(d) Soyabean
52. What is not true for genetic code?
(a) A codon in mRNA is read in a non-contiguous fashion
(b) It is nearly universal
(c) It is degenerate
(d) It is unambiguous
53. Genetic drift operates in
(a) small isolated population
(b) large isolated population
(c) fast reproductive population
(d) slow reproductive population

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54. ‘Jaya’ and ‘Ratna’ developed for green revolution in India are the varieties of
(a) maize
(b) rice
(c) wheat
(d) bajra
55. Product of sexual reproduction generally generates
(a) loner viability of seeds
(b) proloned dormancy
(c) new genetic combination leading to variation
(d) large biomass
56. The main function of mammalian corpus luteum is to produce
(a) estrogen only
(b) progesterone
(c) human chorionic gonadotropin
(d) relaxin only
57. Which one of the following are analogous structures?
(a) Wings of bat and wings of pigeon
(b) Gills of prawn and lungs of man
(c) Thorns of Bougainvillea and tendrils of Cucurbita
(d) Flippers of dolphin and legs of horse
58. Both sickle-cell anaemia and Huntington’s choreas are
(a) bacteria-related diseases
(b) congenital disorders
(c) pollutant-induced disorders
(d) virus-related diseases
59. The world’s highly prized wool yielding ‘Pashmina’ breed is
(a) goat
(b) sheep
(c) goat-sheep cross
(d) Kashmir sheep-Afghan sheep cross
60. Polyethlene glycol method is used for
(a) biodiesel production
(b) seedless fruit production
(c) energy production from sewage
(d) gene transfer without a vector

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61. Human insulin is being commercially produced from a transgenic species of
(a) Rhizobium
(b) Saccharomyces
(c) Escherichia
(d) Mycobacterium
62. Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of
(a) xerophytes
(b) mesophytes
(c) epiphytes
(d) hydrophytes
63. Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem
with four blanks (A-D). Identify the blanks
CConsumers
A
Soil solution
B
D
Uptake
Run off
A B C D
(a) Rock minerals Detritus Litter fall Producers
(b) Litter fall Producers Rock minerals Detritus
(c) Detritus Rock minerals Producer Litter fall
(d) Producers Litter fall Rock minerals Detritus
64. Which one of the following shows maximum genetic diversity in India?
(a) Rice
(b) Maize
(c) Mango
(d) Groundnut
65. Global warming can be controlled by
(a) Reducing deforestation, cutting down use of fossil fuel
(b) Reducing reforestation, increasing the use of fossil fuel
(c) Increasing deforestation, slowing down the growth of human population
(d) Increasing deforestation, reducing efficiency of energy usage

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66. Function of filiform apparatus is to
(a) recognise the suitable pollen at stigma
(b) stimulate division of generative cell
(c) produce nectar
(d) guide the entry of pollen tube
67. Megasporangium is equivalent to
(a) embryo sac
(b) fruit
(c) nucellus
(d) ovule
68. The aquatic fern, which is an excellent biofertiliser is
(a) Azolla
(b) Pteridium
(c) Salvinia
(d) Marselia
69. For transformation, microparticles coated with DNA to be bomarded with gene gun are
made up of
(a) silver or platinum
(b) platinum or zinc
(c) silicon or platinum
(d) gold or tungsten
70. Polysome is formed by
(a) several ribosomes attached to a single mRNA
(b) many ribosomes attached to a strand of endoplasmic reticulum
(c) a ribosome with several subunits
(d) ribosomes attached to each other in a linear arrangement
71. Widal test is carried out to test
(a) malaria
(b) diabetes mellitus
(c) HIV/AIDS
(d) typhoid fever
72. The name of Norman Borlaug is associated with
(a) Green revolution
(b) Yellow revolution
(c) White revolution
(d) Blue revolution

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73. What type of human population is represented by the following age pyramid?
(a) Vanishing population
(b) Stable population
(c) Declining population
(d) Expanding population
74. A species facing extremely high risk of extinction in the immediate future is called
(a) vulnerable
(b) endemic
(c) critically endangered
(d) extinct
75. DNA fragments generated by the restriction endonucleases in a chemical reaction can
be separated by
(a) centrifugation
(b) polymerase chain reaction
(c) electrophoresis
(d) restriction mapping
76. The Genetically Modified (GM) brinjal in India has been developed for
(a) insect-resistance
(b) enhancing self life
(c) enhancing mineral content
(d) drought-resistance
77. Which one of the following is resistant to enzyme action?
(a) Cork
(b) Wood fibre
(c) Pollen exine
(d) Leaf cuticle
78. The testes in humans are situated outside the abdominal cavity inside a pouch called
scrotum. The purpose served is for
(a) escaping any possible compression by the visceral organs
(b) providing more space for the growth of epididymis
(c) providing a secondary sexual feature for exhibiting the male sex
(d) maintaining the scrotal temperature lower than the internal body temperature

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79. Study the pedigree chart given below.
What does it show?
(a) Inheritance of a sex-linked inborn error of metabolism like phenylketonuria
(b) Inheritance of a condition like phenylketonuria as an autosomal recessive trait
(c) The pedigree chart is wrong as this is not possible
(d) Inheritance of a recessive sex-linked diseases like haemophilia
80. The tendency of population to remain in genetic equilibrium may be disturbed by
(a) random mating
(b) lack of migration
(c) lack of mutations
(d) lack of random mating
81. Infection of Ascaris usually occurs by
(a) drinking water containing egg of Ascaris
(b) eating imperfectly cooked port
(c) tse-tse fly
(d) mosquito bite
82. A sedentary sea anemone gets attached to the shell lining of hermit crab. The
association is
(a) ectoparasitism
(b) symbiosis
(c) commensalism
(d) amensalism
83. Natural reservoir of phosphorus is
(a) rock
(b) fossils
(c) sea water
(d) animal bones

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84. The zone of atmosphere in which the ozone layer is present is called
(a) ionosphere
(b) mesosphere
(c) stratosphere
(d) troposphere
85. Sertoli cells are found in
(a) ovaries and secrete progesterone
(b) adrenal cortex and secrete adrenaline
(c) seminiferous tubules and provide nutrition to germ cells
(d) pancreas and secrete cholecystokinin
86. A human female with Turner’s syndrome
(a) has 45 chromosomes with XO
(b) has one additional X-chromosome
(c) exhibits male characters
(d) is able to produce children with normal husband
87. The second stage of hydrosere is occupied by plants like
(a) Azolla
(b) Typha
(c) Salix
(d) Vallisneria
88. Haemophilia is more commonly seen in human males than in human females because
(a) this disease is due to and X-linked dominant mutation
(b) a greater proportion of girls die in infancy
(c) this disease is due to an X-linked recessive mutation
(d) this disease is due to a Y-linked recessive mutation
89. During sewage treatment, biogases are produced, which include
(a) methane, hydrogen sulphide and carbon dioxide
(b) methane, oxygen and hydrogen sulphide
(c) hydrogen sulphide, methane and sulphur dioxide
(d) hydrogen sulphide, nitrogen and methane
90. Removal of introns and joining of exons in a defined order during transcription is
called
(a) looking
(b) inducing
(c) slicing
(d) splicing