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NEET - October 2020 Previous Year Questions



NEET Biology Previous Year Questions - October 2020

Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:

[class-xi ]

  • Gibberellic acid
  • Nitrate
  • Ascorbic acid
  • Chilling conditions
  • Correct Option: C  [ Ascorbic acid ]

    Remark:

Match the following concerning the activity/function and the phytohormone involved:

(A)Fruit ripener (I)Abscisic acid
(B)Herbicide (II)GA3
(C)Bolting agent (III)2, 4-D
(D)Stress hormone (IV)Ethephon
Select the correct option from following:

[class-xi ]

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

    Remark:

A species which was introduced for ornamentation but has become a trouble-some weed in India:

[class-xi ]

  • Parthenium hysterophorus
  • Eichhornia crassipes
  • Prosopis juliflora
  • Trapa spinosa
  • Correct Option: B  [ Eichhornia crassipes ]

    Remark:

Intrinsic factor that helps in the absorption of vitamin B12 is secreted by:

[class-xi ]

  • Goblet cells
  • Hepatic cells
  • Oxyntic cells
  • Chief cells
  • Correct Option: C  [ Oxyntic cells ]

    Remark:

The proteolytic enzyme rennin is found in:

[class-xi ]

  • Intestinal juice
  • Bile juice
  • Gastric juice
  • Pancreatic juice
  • Correct Option: C  [ Gastric juice ]

    Remark:

The Total Lung Capacity (TLC) is the total volume of air accomodated in the lungs at the end of a forced inspiration. This includes:

[class-xi ]

  • RV; IC (Inspiratory Capacity); EC (Expiratory Capacity); and ERV
  • RV; ERV; IC and EC
  • RV; ERV; VC (Vital Capacity) and FRC (Functional Residual Capacity)
  • RV (Residual Volume); ERV (Expiratory Reserve Volume); TV (Tidal Volume); and IRV (Inspiratory Reserve Volume)
  • Correct Option: D  [ RV (Residual Volume); ERV (Expiratory Reserve Volume); TV (Tidal Volume); and IRV (Inspiratory Reserve Volume) ]

    Remark:

Match the following columns and select the correct option :

Column-I Column-II
(A)Pneumotaxic Centre (I)Alveoli
(B)O2 Dissociation curve (II) Pons region of brain
(C)Carbonic Anhydrase (III)Haemoglobin
(D)Primary site of exchange of gases (IV)R.B.C.

[class-xi ]

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

    Remark:

According to Central Pollution Control Board [CPCB] what size (in diameter) of particulate is responsible for causing greater harm to human health ?

[class-xi ]

  • 3.5 micrometers
  • 2.5 micrometers
  • 4.0 micrometers
  • 3.0 micrometers
  • Correct Option: B  [ 2.5 micrometers ]

    Remark:

Which of the following conditions cause erythroblastosis foetalis ?

[class-xi ]

  • Mother Rh+ve and foetus Rh–ve
  • Mother Rh–ve and foetus Rh+ve
  • Both mother and foetus Rh–ve
  • Both mother and foetus Rh+ve
  • Correct Option: B  [ Mother Rh–ve and foetus Rh+ve ]

    Remark:

The increase in osmolarity from outer to inner medullary interstitium is maintained due to:
I. Close proximity between Henle's loop and vasa recta
II. Counter current mechanism
III. Selective secretion of HCO3- and hydrogen ions in PCT
IV. Higher blood pressure in glomerular capillaries

[class-xi ]

  • Only(II)
  • (III) and (IV)
  • (I), (II) and (III)
  • (I) and (II)
  • Correct Option: D  [ (I) and (II) ]

    Remark: