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NEET - 2019 Previous Year Questions



NEET Biology Previous Year Questions - 2019

Which of the following factors is responsible for the formation of concentrated urine?

NEET-2019 [Excretory-Products-and-their-Elimination] [class-xi ]

  • Low levels of antidiuretic hormone.
  • Secretion of erythropoietin by juxtaglomerular complex.
  • Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys.
  • Hydrostatic pressure during glomerular filtration.
  • Correct Option: C  [ Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys. ]

    Remark:

Use of an artificial kidney during hemodialysis may result in:
(A) Nitrogenous waste build-up in the body
(B) Non-elimination of excess potassium ions
(C) Reduced absorption of calcium ions from gastrointestinal tract
(D) Reduced RBC production
Which of the following options is the most appropiate?

NEET-2019 [Excretory-Products-and-their-Elimination] [class-xi ]

  • (A) and (B) are correct
  • (B) and (C) are correct
  • (A) and (D) are correct
  • (C) and (D) are correct
  • Correct Option: D  [ (C) and (D) are correct ]

    Remark:

Select the correct option.

NEET-2019 [Locomotion-and-Movement] [class-xi ]

  • 8th, 9th and 10th pairs of ribs articulate directly with the sternum.
  • There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.
  • 11th and 12thpairs of ribs are connected to the sternum with the help of hyaline cartilage.
  • Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
  • Correct Option: B  [ There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs. ]

    Remark:

Which of the following muscular disorders is inherited ?

NEET-2019 [Locomotion-and-Movement] [class-xi ]

  • Tetany
  • Myasthenia gravis
  • Muscular dystrophy
  • Botulism
  • Correct Option: C  [ Muscular dystrophy ]

    Remark:

Which part of the brain is responsible for thermoregulation?

NEET-2019 [Neural-Control-and-Coordination] [class-xi ]

  • Hypothalamus
  • Cerebrum
  • Corpus callosum
  • Medulla oblongata
  • Correct Option: A  [ Hypothalamus ]

    Remark:

Which of the following statements is correct?

NEET-2019 [Neural-Control-and-Coordination] [class-xi ]

  • Cornea consists of dense connective tissue of elastin and can repair itself.
  • Cornea is an external, transparent and protective proteinacious covering of the eye-ball.
  • Cornea is convex, transparent layer which is highly vascularised.
  • Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye.
  • Correct Option: B  [ Cornea is an external, transparent and protective proteinacious covering of the eye-ball. ]

    Remark:

Which of the following glucose transporters is insulin-dependent?

NEET-2019 [Chemical-Coordination-and-Integration] [class-xi ]

  • GLUT I
  • GLUT II
  • GLUT IV
  • GLUT III
  • Correct Option: C  [ GLUT IV ]

    Remark:

Match the following hormones with the respective disease:

(A)Insulin (I)Addison's disease
(B)Thyroxin (II)Diabetes insipidus
(C)Corticoids (III)Acromegaly
(D)Growth Hormone (IV)Goitre
(V)Diabetes mellitus

NEET-2019 [Chemical-Coordination-and-Integration] [class-xi ]

  • (A)-(V), (B)-(I), (C)-(II), (D)-(III)
  • (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
  • (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
  • (A)-(V), (B)-(IV), (C)-(I), (D)-(III)
  • Correct Option: D  [ (A)-(V), (B)-(IV), (C)-(I), (D)-(III) ]

    Remark:

How does steroid hormone influence the cellular activities?

NEET-2019 [Chemical-Coordination-and-Integration] [class-xi ]

  • Using aquaporin channels as second messenger.
  • Activating cyclic AMP located on the cell membrane.
  • Binding to DNA and forming a gene-hormone complex.
  • Changing the permeability of the cell membrane.
  • Correct Option: C  [ Binding to DNA and forming a gene-hormone complex. ]

    Remark:

Which of the following statements is incorrect?

NEET-2019 [Reproduction-in-Organisms] [class-xii ]

  • Morels and truffles are edible delicacies.
  • Yeasts have filamentous bodies with long threadlike hyphae.
  • Claviceps is a source of many alkaloids and LSD.
  • Conidia are produced exogenously and ascospores endogenously.
  • Correct Option: B  [ Yeasts have filamentous bodies with long threadlike hyphae. ]

    Remark: