NEET Biology: Medical Entrance Biology Questions and Answers

Useful for Medical Entrance Exams

2018 NEET UG Biology Questions and Answers (81-90)


81. Select the incorrect match :
(1) Submetacentric – L-shaped chromosomes chromosomes
(2) Allosomes – Sex chromosomes
(3) Lampbrush – Diplotene bivalents chromosomes
(4) Polytene chromosomes – Oocytes of amphibians
Answer (4 )

2018 NEET UG Biology Questions and Answers

82. Which of the following terms describe human dentition?
(1) Pleurodont, Monophyodont, Homodont
(2) Thecodont, Diphyodont, Heterodont
(3) Thecodont, Diphyodont, Homodont
(4) Pleurodont, Diphyodont, Heterodont
Answer ( 2 )

83. Which of the following events does not occur in rough endoplasmic reticulum?
(1) Cleavage of signal peptide

(2) Protein glycosylation
(3) Protein folding
(4) Phospholipid synthesis
Answer ( 4 )

84. Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
(1) Plastidome
(2) Polyhedral bodies
(3) Polysome
(4) Nucleosome
Answer (3)
85. In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
(1) Ringworm disease
(2) Ascariasis
(3) Elephantiasis
(4) Amoebiasis
Answer (3)

86. Which of the following is not an autoimmune disease?

(1) Alzheimer's disease
(2) Rheumatoid arthritis
(3) Psoriasis
(4) Vitiligo                                                                                                     Answer (1)

87. Among the following sets of examples for divergent evolution, select the incorrect option :
(1) Brain of bat, man and cheetah
(2) Heart of bat, man and cheetah
(3) Forelimbs of man, bat and cheetah
(4) Eye of octopus, bat and man                                                                   Answer (4)

88. Conversion of milk to curd improves its nutritional value by increasing the amount of
(1) Vitamin B12
(2) Vitamin A
(3) Vitamin D
(4) Vitamin E 
                                                                                                                        Answer (1)
89. The similarity of bone structure in the forelimbs of many vertebrates is an example of
(1) Convergent evolution
(2) Analogy
(3) Homology
(4) Adaptive radiation
Answer ( 3 )


90. Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
(1) b, d and e (2) a, b and c (3) b, c and e (4) a, c and e
Answer ( 2 )

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NEET Biology Questions and Answers 2018 (71-80)

NEET Biology Questions and Answers 2018
71. AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
(1) ACCUAUGCGAU (2) UGGTUTCGCAT
(3) AGGUAUCGCAU (4) UCCAUAGCGUA
Answer (3) AGGUAUCGCAU 
72. Match the items given in Column I with those in Column II and select the correct option given below :
Column I                                                    Column II
a. Proliferative Phase                i. Breakdown ofendometriallining
b. Secretory Phase                    ii. Follicular Phase
c. Menstruation                         iii. Luteal Phase
      a b c
(1) ii iii i
(2) i iii ii
(3) iii ii i
(4) iii i ii

Answer (1) ii -a iii-b i-c
73. Match the items given in Column I with those in Column II and select the correct option given below :
Column I                                  Column II
a. Glycosuria                    i. Accumulation of uric acid in joints
b. Gout                            ii. Mass of crystallized salts within the kidney
c. Renal calculi               iii. Inflammation in glomeruli
d. Glomerular                 iv. Presence of nephritis glucose in urine
       a b c d
(1) ii iii i iv
(2) i ii iii iv
(3) iii ii iv i
(4) iv i ii iii
Answer (4) iv -a i-b ii-c iii-d
74. Match the items given in Column I with those in Column II and select the correct option given below:
Column I                             Column II
(Function)               (Part of Excretorysystem)
a. Ultrafiltration               i. Henle's loop
b. Concentration of urine ii. Ureter
c. Transport of urine        iii. Urinary bladder
d. Storage of urine           iv. Malpighian corpuscle

                                           v. Proximal   convoluted tubule
      a b c d
(1) v iv i ii
(2) iv i ii iii
(3) iv v ii iii
(4) v iv i iii
Answer ( 2 ) iv-a i-b ii-c iii-d
75. Which of the following gastric cells indirectly help in erythropoiesis?
(1) Goblet cells
(2) Mucous cells
(3) Chief cells
(4) Parietal cells
Answer(4) Parietal cells
76. Match the items given in Column I with those in Column II and select the correct option given below :
Column I             Column II
a. Fibrinogen  (i) Osmotic balance
b. Globulin     (ii) Blood clotting
c. Albumin     (iii) Defence mechanism

         a b c
(1) (i) (iii) (ii)
(2) (i) (ii) (iii)
(3) (iii) (ii) (i)
(4) (ii) (iii) (i)
Answer (4)
77. Which of the following is an occupational respiratory disorder?
(1) Botulism (2) Silicosis (3) Anthracis (4) Emphysema
Answer (2)Silicosis
78. Calcium is important in skeletal muscle contraction because it
(1) Detaches the myosin head from the actin filament.
(2) Activates the myosin ATPase by binding to it.
(3) Binds to troponin to remove the masking of active sites on actin for myosin.
(4) Prevents the formation of bonds between the myosin cross bridges and the actin
filament.
Answer (3) Binds to troponin to remove the masking of active sites on actin for myosin.
79. Nissl bodies are mainly composed of
(1) Nucleic acids and SER
(2) DNA and RNA
(3) Proteins and lipids
(4) Free ribosomes and RER
Answer (4) Free ribosomes and RER
80. Which of these statements is incorrect?
(1) Glycolysis operates as long as it is supplied with NAD that can pick up
hydrogen atoms
(2) Glycolysis occurs in cytosol
(3) Enzymes of TCA cycle are present in mitochondrial matrix
(4) Oxidative phosphorylation takes place in outer mitochondrial membrane
Answer (4) Oxidative phosphorylation takes place in outer mitochondrial membrane
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2018 NEET Biology Questions (61-70)


61. Which of the following animals does not undergo metamorphosis?
(1) Moth (2) Tunicate (3) Earthworm (4) Starfish
Answer ( 3 )Earthworm 

62. Which of the following organisms are known as chief producers in the oceans?
(1) Cyanobacteria (2) Diatoms (3) Dinoflagellates (4) Euglenoids
Answer ( 2 ) Diatoms 

63. Which one of the following population interactions is widely used in medical science for the production of antibiotics?
(1) Parasitism (2) Mutualism (3) Commensalism (4) Amensalism
Answer ( 4 )Amensalism

2018 NEET Biology Questions
64. All of the following are included in ‘ex-situ conservation’ except
(1) Botanical gardens
(2) Sacred groves
(3) Wildlife safari parks
(4) Seed banks
Answer (2) Sacred groves

65. Match the items given in Column I with those in Column II and select the correct option given below :
Column-I                 Column-II
a. Eutrophication i. UV-B radiation
b. Sanitary landfill ii. Deforestation
c. Snow blindness iii. Nutrient enrichment
d. Jhum cultivation iv. Waste disposal
      a b c d
(1) iii iv i ii
(2) i iii iv ii
(3) ii i iii iv
(4) i ii iv iii
Answer ( 1 )

66. In a growing population of a country,
(1) reproductive and pre-reproductive individuals are equal in number.
(2) reproductive individuals are less than the post-reproductive individuals.
(3) pre-reproductive individuals are more than the reproductive individuals.
(4) pre-reproductive individuals are less than the reproductive individuals.
Answer ( 3 )pre-reproductive individuals are more than the reproductive individuals.

67. Which part of poppy plant is used to obtain the drug “Smack”?
(1) Roots (2) Latex (3) Flowers (4) Leaves
Answer ( 2 )Latex

68. All of the following are part of an operon except
(1) an enhancer
(2) structural genes
(3) an operator
(4) a promoter
Answer (1)an enhancer


69. A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
(1) Only grandchildren
(2) Only sons
(3) Only daughters
(4) Both sons and daughters
Answer (4) Both sons and daughters

70. According to Hugo de Vries, the mechanism of evolution is
(1) Phenotypic variations
(2) Saltation
(3) Multiple step mutations
(4) Minor mutations
Answer (2)Saltation

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2018 NEET Biology Questions (51-60)

51. Which of the following hormones can play a significant role in osteoporosis?
(1) Estrogen and Parathyroid hormone
(2) Progesterone and Aldosterone
(3) Aldosterone and Prolactin
(4) Parathyroid hormone and Prolactin
Answer: (1) Estrogen and Parathyroid hormone
52. Which of the following structures or regions is incorrectly paired with its functions?
(1) Hypothalamus : production of releasing hormones and regulation of
temperature,hunger and thirst.
(2) Limbic system : consists of fibre tracts that interconnect different regions of
brain; controls movement.
(3) Medulla oblongata : controls respiration and cardiovascular reflexes.
(4) Corpus callosum : band of fibers connecting left and right cerebral hemispheres.
Answer (2) Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.


53. The amnion of mammalian embryo is derived from
(1) mesoderm and trophoblast
(2) endoderm and mesoderm
(3) ectoderm and mesoderm
(4) ectoderm and endoderm
Answer (3) ectoderm and mesoderm
NEET Biology Questions 2018
54. Hormones secreted by the placenta to maintain pregnancy are
(1) hCG, hPL, progestogens, estrogens
(2) hCG, hPL, estrogens, relaxin, oxytocin
(3) hCG, hPL, progestogens, prolactin
(4) hCG, progestogens, estrogens, glucocorticoids
Answer (1) hCG, hPL, progestogens, estrogens

55. The difference between spermiogenesis and spermiation is
(1) In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
(2) In spermiogenesis spermatozoa are formed, while in spermiation spermatids
are formed.
(3) In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
(4) In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa
are released from sertoli cells into the cavity of seminiferous tubules.
Answer (4) In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.



56. The contraceptive ‘SAHELI’
(1) is an IUD.
(2) increases the concentration of estrogen and prevents ovulation in females.
(3) blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
(4) is a post-coital contraceptive.
Answer (3) blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
57. Ciliates differ from all other protozoans in
(1) using pseudopodia for capturing prey
(2) having a contractile vacuole for removing excess water
(3) using flagella for locomotion
(4) having two types of nuclei
Answer (4) having two types of nuclei
58. I dentify the vertebrate group of animals characterized by crop and gizzard in its digestive system
(1) Aves (2) Reptilia (3) Amphibia (4) Osteichthyes
Answer (1) Aves
59. Which of the following features is used to identify a male cockroach from a female cockroach?
(1) Forewings with darker tegmina
(2) Presence of caudal styles
(3) Presence of a boat shaped sternum on the 9th abdominal segment
(4) Presence of anal cerci
Answer (2) Presence of caudal styles
60. Which one of these animals is not a homeotherm?
(1) Camelus (2) Chelone (3) Macropus (4) Psittacula
Answer (2) Chelone

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NEET UG - Biology Questions 2018 (41-50)

NEET Biology Questions 2018
41. Select the wrong statement :
(1) Pseudopodia are locomotory and feeding structures in Sporozoans
(2) Mushrooms belong to Basidiomycetes
(3) Cell wall is present in members of Fungi and Plantae
(4) Mitochondria are the powerhouse of the cell in all kingdoms except Monera
Answer(1) Pseudopodia are locomotory and feeding structures in Sporozoans

42. After karyogamy followed by meiosis, spores are produced exogenously in
(1) Agaricus
(2) Alternaria
(3) Neurospora
(4) Saccharomyces

Answer(1) Agaricus
43. Match the items given in Column I with those in Column II and select the correct option given below:

Column I                                                             
Column II
a. Herbarium
(i) It is a place having a
collection of preserved
plants and animals
b. Key
(ii) A list that enumerates
methodically all the
species found in an area
with brief description
aiding identification
c. Museum
(iii) Is a place where dried
and pressed plant
specimens mounted on
sheets are kept
d. Catalogue
(iv) A booklet containing a
list of characters and
their alternates which
are helpful in
identification of various
taxa.
      a    b     c    d
(1) (ii) (iv) (iii) (i)
(2) (iii) (ii) (i) (iv)
(3) (i) (iv) (iii) (ii)
(4) (iii) (iv) (i) (ii)
Answer ( 4 ) (4) (iii-a) (iv-b) (i-c) (ii-d)
44. Winged pollen grains are present in
(1) Mango

 (2) Cycas
(3) Mustard
(4) Pinus
Answer  (4) Pinus
45. Which one is wrongly matched?
(1) Gemma cups – Marchantia
(2) Biflagellate zoospores – Brown algae
(3) Uniflagellate gametes – Polysiphonia
(4) Unicellular organism – Chlorella

Answer (3) Uniflagellate gametes – Polysiphonia

46. Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
(1) Increased respiratory surface; Inflammation of bronchioles
(2) Increased number of bronchioles; Increased respiratory surface
(3) Inflammation of bronchioles; Decreased respiratory surface
(4) Decreased respiratory surface; Inflammation of bronchioles
Answer (3) Inflammation of bronchioles; Decreased respiratory surface


47. Match the items given in Column I with those in Column II and select the correct option given below :
Column I                                                        Column II
a. Tricuspid valve                        i. Between left atrium and left ventricle
b. Bicuspid valve                         ii. Between right ventricle and pulmonary artery
c. Semilunar valve                      iii. Between right atrium and right ventricle

     a b c
(1) i ii iii
(2) i iii ii
(3) iii i ii
(4) ii i iii
Answer (3) iii-a i -b ii-c
48. Match the items given in Column I with those in Column II and select the correct option given below:
Column I                                                  Column II
a. Tidal volume                             i. 2500 – 3000 mL
b. Inspiratory Reserve                 ii. 1100 – 1200 mL
c. Expiratory Reserve volume    iii. 500 – 550 mL
volume
d. Residual volume iv. 1000 – 1100 mL
     a b c d
(1) i iv ii iii
(2) iii i iv ii
(3) iii ii i iv
(4) iv iii ii i

Answer (2) iii-a i-b iv-c ii-d

49. The transparent lens in the human eye is held in its place by
(1) smooth muscles attached to the iris
(2) ligaments attached to the iris
(3) ligaments attached to the ciliary body
(4) smooth muscles attached to the ciliarybody
Answer (3) ligaments attached to the ciliary body
50. Which of the following is an amino acid derived hormone?
(1) Estradiol
(2) Ecdysone
(3) Epinephrine
(4) Estriol
Answer (3) Epinephrine
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