NEET 2018 Biology Solved Paper

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Q1. Organisation for GM safety in India?
Correct Answer: (c)
GEAC handles GM safety.
Q2. Stomata not affected by?
Correct Answer: (d)
O2 concentration has negligible effect.
Q3. Semiconservative replication proof first in
Correct Answer: (b)
E. coli (bacterium) was used.
Q4. All of the following are part of an operon except
Correct Answer: (d)
Enhancer sequences are present in eukaryotes. Operon concept is for prokaryotes.
Q5. Correct match:
Correct Answer: (c)
Jacob and Monod described the Lac Operon.
Q6. Among the following sets of examples for divergent evolution, select the incorrect option :
Correct Answer: (c)
Eyes of Octopus and Mammals are analogous organs (Convergent evolution), not divergent.
Q7. Golgi complex participates in
Correct Answer: (b)
Golgi packages materials into secretory vesicles.
Q8. Pyramid type (SC:120g, PC:60g, PP:10g)?
Correct Answer: (a)
Inverted biomass (aquatic typical).
Q9. The amnion of mammalian embryo is derived from
Correct Answer: (a)
Amnion is formed from mesoderm on the outer side and ectoderm on the inner side (Somatopleure).
Q10. Iron absorption form in plants?
Correct Answer: (a)
Plants absorb iron as Ferric (Fe3+).
Q11. Not a product of light reaction?
Correct Answer: (b)
NADH is from respiration, not light reaction.
Q12. Which of the following gastric cells indirectly help in erythropoiesis?
Correct Answer: (c)
Parietal cells secrete Intrinsic Factor for Vitamin B12 absorption.
Q13. Vector for human lymphocytes?
Correct Answer: (a)
Retroviruses are used for animal cells.
Q14. According to Hugo de Vries, the mechanism of evolution is
Correct Answer: (b)
Hugo de Vries proposed mutation theory where evolution is a single step large mutation called Saltation.
Q15. The difference between spermiogenesis and spermiation is
Correct Answer: (c)
Spermiogenesis is the transformation of spermatids into spermatozoa, whereas spermiation is the release of sperms from sertoli cells into the lumen of the seminiferous tubule.
Q16. Match the valves:

a. Tricuspidiii. Right atrium-ventricle
b. Bicuspidi. Left atrium-ventricle
c. Semilunarii. Ventricle-pulmonary artery
Correct Answer: (a)
Tricuspid (Right), Bicuspid (Left), Semilunar (Ventricle-Artery).
Q17. Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
Correct Answer: (a)
Asthma involves inflammation of bronchioles. Emphysema involves alveolar wall damage.
Q18. Natality refers to
Correct Answer: (b)
Natality = Birth rate.
Q19. Pollen storage temperature (Liquid N2)?
Correct Answer: (d)
Liquid nitrogen is at -196°C.
Q20. Match the items given in Column I with those in Column II:

Column-IColumn-II
a. Eutrophicationiii. Nutrient enrichment
b. Sanitary landfilliv. Waste disposal
c. Snow blindnessi. UV-B radiation
d. Jhum cultivationii. Deforestation
Correct Answer: (d)
Eutrophication (Nutrient enrichment), Sanitary landfill (Waste disposal), Snow blindness (UV-B), Jhum cultivation (Deforestation).
Q21. Nissl bodies are mainly composed of
Correct Answer: (c)
Nissl bodies are clusters of RER and free ribosomes.
Q22. Role of NAD+ in respiration?
Correct Answer: (b)
NAD+ acts as an electron carrier.
Q23. Calcium is important in skeletal muscle contraction because it
Correct Answer: (a)
Calcium binds to Troponin C to unmask active sites on actin.
Q24. Match lung volumes:
a. TViii. 500 mL
b. IRVi. 2500–3000 mL
c. ERViv. 1000–1100 mL
d. RVii. 1100–1200 mL
Correct Answer: (b)
TV (500), IRV (2500-3000), ERV (1000-1100), RV (1100-1200).
Q25. Double fertilization is
Correct Answer: (c)
It is the combination of Syngamy and Triple Fusion.
Q26. AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
Correct Answer: (a)
Coding strand and mRNA have the same sequence, except T is replaced by U in mRNA.
Q27. Secondary xylem/phloem from
Correct Answer: (b)
Vascular cambium produces them.
Q28. Which describe human dentition?
Correct Answer: (b)
Humans are Thecodont, Diphyodont, and Heterodont.
Q29. In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
Correct Answer: (a)
Elephantiasis (Filariasis) affects lymphatic vessels, transmitted by Culex mosquito.
Q30. A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
Correct Answer: (c)
A woman transmits X chromosomes to both sons and daughters.
Q31. Correct statement:
Correct Answer: (a)
Gymnosperms have naked seeds.
Q32. Identify male cockroach by:
Correct Answer: (b)
Anal (caudal) styles are present only in males.
Q33. Match excretory parts:
a. Ultrafiltrationiv. Malpighian corpuscle
b. Concentrationi. Henle's loop
c. Transportii. Ureter
d. Storageiii. Bladder
Correct Answer: (b)
Correct matches for ultrafiltration, concentration, transport and storage.
Q34. Correct PCR steps?
Correct Answer: (c)
Denaturation -> Annealing -> Extension.
Q35. Casparian strips in
Correct Answer: (c)
Found in the endodermis.
Q36. Which of these statements is incorrect?
Correct Answer: (c)
Oxidative phosphorylation occurs in the inner membrane.
Q37. Offsets are produced by
Correct Answer: (b)
Offsets are vegetative (mitosis).
Q38. Chromosomes separation begins in
Correct Answer: (b)
Desynapsis begins in Diplotene.
Q39. 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
Correct Answer: (b)
ABO blood group shows Dominance (IA, IB > i), Co-dominance (IAIB), and Multiple alleles (IA, IB, i).
Q40. Unauthorised use of bioresources is
Correct Answer: (b)
This is called Biopiracy.
Q41. Spores exogenously in
Correct Answer: (d)
Agaricus produces basidiospores exogenously.
Q42. No secondary growth in
Correct Answer: (a)
Grasses (monocots) lack it.
Q43. Stomata in grass leaf are
Correct Answer: (a)
Grasses have dumb-bell shaped guard cells.
Q44. Conversion of milk to curd improves its nutritional value by increasing the amount of
Correct Answer: (d)
LAB increases Vitamin B12 content during curd formation.
Q45. Ciliates differ from other protozoans in
Correct Answer: (c)
Ciliates have nuclear dimorphism.
Q46. Which of the following is an amino acid derived hormone?
Correct Answer: (a)
Epinephrine is derived from Tyrosine.
Q47. In a growing population of a country,
Correct Answer: (a)
A growing population has a broad base with more pre-reproductive individuals.
Q48. Variety of rice patented by US company?
Correct Answer: (c)
Basmati was patented by RiceTec.
Q49. Select correct match:
Correct Answer: (a)
Ribozymes are catalytic RNA.
Q50. Which one of the following population interactions is widely used in medical science for the production of antibiotics?
Correct Answer: (c)
Antibiosis (Amensalism) is where one organism is harmed and the other is unaffected.
Q51. Element for turgor in cells?
Correct Answer: (d)
Potassium (K+) regulates stomata and turgidity.
Q52. Sweet potato is
Correct Answer: (b)
It is a storage root.
Q53. All of the following are included in ‘ex-situ conservation’ except
Correct Answer: (b)
Sacred groves are In-situ conservation.
Q54. Pneumatophores occur in
Correct Answer: (a)
Mangroves (Halophytes) have them.
Q55. Chief producers in oceans?
Correct Answer: (b)
Diatoms are the chief producers in the oceans.
Q56. Identify the group with crop and gizzard
Correct Answer: (d)
Birds (Aves) have a crop and gizzard.
Q57. Winged pollen in
Correct Answer: (c)
Pinus has winged pollen.
Q58. The contraceptive ‘SAHELI’
Correct Answer: (a)
Saheli contains centchroman (non-steroidal) which blocks estrogen receptors in the uterus, preventing implantation.
Q59. Which is incorrectly paired?
Correct Answer: (b)
Limbic system regulates emotions, not primarily movement.
Q60. True for nucleolus?
Correct Answer: (c)
Nucleolus is the site for rRNA synthesis.
Q61. Ozone degradation catalyst?
Correct Answer: (b)
Chlorine acts as a catalyst.
Q62. Which part of poppy plant is used to obtain the drug “Smack”?
Correct Answer: (b)
Smack (Heroin) is obtained from the latex of the unripe capsule of the Poppy plant.
Q63. Which is not a prokaryote?
Correct Answer: (a)
Saccharomyces (Yeast) is a Eukaryote.
Q64. Match taxonomic aids:
HerbariumDried plants
KeyBooklet for ID
MuseumPreserved specimens
CatalogueList of species
Correct Answer: (c)
Matches for Herbarium, Key, Museum, Catalogue.
Q65. Match conditions:
a. Glycosuriaiv. Glucose in urine
b. Gouti. Uric acid in joints
c. Renal calculiii. Salt crystals
d. Nephritisiii. Inflammation
Correct Answer: (c)
Definitions for glycosuria, gout, calculi and nephritis.
Q66. The similarity of bone structure in the forelimbs of many vertebrates is an example of
Correct Answer: (a)
Similar structure but different function indicates Homology (Divergent evolution).
Q67. Which does not occur in RER?
Correct Answer: (c)
Phospholipid synthesis occurs in the Smooth ER.
Q68. Two functional groups of sugars?
Correct Answer: (c)
Sugars have Carbonyl and Hydroxyl groups.
Q69. Pollen preservation as fossils?
Correct Answer: (c)
Sporopollenin is highly resistant.
Q70. Match plasma proteins:
a. Fibrinogenii. Clotting
b. Globuliniii. Defence
c. Albumini. Osmotic balance
Correct Answer: (c)
Fibrinogen-Clotting, Globulin-Defence, Albumin-Balance.
Q71. Correct statement:
Correct Answer: (b)
Reginald Punnett was British.
Q72. Many ribosomes on a single mRNA are called
Correct Answer: (a)
A group of ribosomes translating mRNA is a Polysome.
Q73. Match the items given in Column I with those in Column II and select the correct option given below :

Column IColumn II
a. Proliferative Phaseii. Follicular Phase
b. Secretory Phaseiii. Luteal Phase
c. Menstruationi. Breakdown of endometrial lining
Correct Answer: (d)
Proliferative Phase = Follicular Phase (ii). Secretory Phase = Luteal Phase (iii). Menstruation = Breakdown of lining (i).
Q74. Wrong statement:
Correct Answer: (d)
Sporozoans lack locomotory structures.
Q75. Which of the following hormones can play a significant role in osteoporosis?
Correct Answer: (d)
Deficiency of Estrogen and excess of PTH lead to bone loss.
Q76. Which of the following is an occupational respiratory disorder?
Correct Answer: (b)
Silicosis is caused by inhalation of silica dust.
Q77. The transparent lens in the human eye is held in its place by
Correct Answer: (a)
Suspensory ligaments attached to the Ciliary body hold the lens.
Q78. Hormones secreted by the placenta to maintain pregnancy are
Correct Answer: (d)
Placenta releases hCG, hPL, estrogens and progestogens to maintain pregnancy.
Q79. Flowers only once?
Correct Answer: (a)
Bamboo species are monocarpic.
Q80. Which does not undergo metamorphosis?
Correct Answer: (a)
Earthworms have direct development.
Q81. Which of the following is not an autoimmune disease?
Correct Answer: (d)
Alzheimer's is a neurodegenerative disease (deficiency of acetylcholine), not autoimmune.
Q82. Niche is
Correct Answer: (c)
Niche is the functional role.
Q83. Wrongly matched?
Correct Answer: (a)
Polysiphonia (Red algae) has non-motile gametes.
Q84. Oxygen not produced by
Correct Answer: (a)
Green sulphur bacteria use H2S, not H2O.
Q85. Select the incorrect match:
Correct Answer: (c)
Polytene chromosomes are in salivary glands, not oocytes.
Q86. Which plant has obligate relationship with a moth?
Correct Answer: (b)
Yucca and Pronuba moth are mutualistic.
Q87. Which is not a homeotherm?
Correct Answer: (b)
Chelone (Turtle) is a reptile (poikilotherm).
Q88. Secondary pollutant?
Correct Answer: (c)
Ozone (O3) is secondary.
Q89. Wrongly matched?
Correct Answer: (a)
Pea starch is pleiotropy.
Q90. Ozone Day?
Correct Answer: (d)
Sept 16 is World Ozone Day.

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