Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

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 volume ii 1100 – 1200 mL
c Expiratory Reserve volume iii 500 – 550 mL
d Residual volume iv 1000 – 1100 mL

  •  

    a b c d
    iii ii i iv
  • a b c d
    iii i iv ii
  • a b c d
    iv iii ii i
  • a b c d
    i iv ii iii

B.

a b c d
iii i iv ii
  1. Tidal volume is the volume of air inspired or expired during normal respiration. It is approximately 500 mL.
  2. Inspiratory reserve volume is an additional volume of air a person can inspire by a forceful inspiration. It is around 2500 – 3000 mL.
  3. Expiratory reserve volume is the additional volume of air a person can be expired by a forceful expiration. This averages 1000 – 1100 mL.
  4. Residual volume is the volume of air remaining in lungs even after forceful expiration. This averages 1100 – 1200 mL.

2.

The transparent lens in the human eye is held in its place by

  • ligaments attached to the ciliary body

  • ligaments attached to the iris

  • smooth muscles attached to the ciliary body

  • smooth muscles attached to the iris


A.

ligaments attached to the ciliary body

Lens in the human eye is held in its place by suspensory ligaments attached to the ciliary body.


3.

Calcium is important in skeletal muscle contraction because it

  • Binds to troponin to remove the masking of active sites on actin for myosin.

  • Activates the myosin ATPase by binding to it.

  • Prevents the formation of bonds between the myosin cross bridges and the actin filament.

  • Detaches the myosin head from the actin filament.


A.

Binds to troponin to remove the masking of active sites on actin for myosin.

The signal for contraction increase Ca++ level many folds in the sarcoplasm.

Ca++ now binds with sub-unit of troponin (troponin "C") which is masking the active site on actin filament and displaces the sub-unit of troponin.

Once the active site is exposed, head of the myosin attaches and initiate contraction by sliding the actin over myosin.


4.

Which of the following hormones can play a significant role in osteoporosis?

  • Aldosterone and Prolactin

  • Progesterone and Aldosterone

  • Parathyroid hormone and Prolactin

  • Estrogen and Parathyroid hormone


D.

Estrogen and Parathyroid hormone


5.

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
    iii ii i
  •  

    a b c
    i ii iii
  • a b c
    ii iii i
  • a b c
    i ii iii

C.

a b c
ii iii i

Fibrinogen forms fibrin strands during coagulation. These strands forms a network and the meshes of which are occupied by blood cells, this structure finally forms a clot.

Antibodies are derived from - Globulin fraction of plasma proteins which means globulins are involved in defence mechanisms.

Albumin is a plasma protein mainly responsible for BCOP.


6.

Which of the following structures or regions is incorrectly paired with its functions?

  • Medulla oblongata : Controls respiration and cardiovascular reflexes

  • Limbic system: consists of fibre tracts that interconnect different regions of brain; controls movement.

  • Corpus callosum: band of fibres connecting system: left and right cerebral hemispheres.

  • Hypothalamus: production of releasing hormones and regulation of temperature,the hunger and thirst.


B.

Limbic system: consists of fibre tracts that interconnect different regions of brain; controls movement.

Limbic system (emotional motor system) is emotional brain. It controls all emotions in our body but not movements. It is located in the core of the brain and includes the amygadla, hippocampus and hypothalamus.


7.

Which of the following gastric cells indirectly help in erythropoiesis?

  • Chief cells

  • Mucous cells

  • Parietal cells

  • Goblet cells


C.

Parietal cells

Parietal or oxyntic cell is a source of HCl and intrinsic factor. HCl converts iron present in diet from ferric to ferrous form so that it can be absorbed easily and used during erythropoiesis.

Intrinsic factor is essential for the absorption of vitamin B12 and its deficiency causes pernicious anaemia.


8.

Which of the following is an amino acid derived hormone?

  • Epinephrine

  • Ecdysone

  • Estriol

  • Estradiol


A.

Epinephrine

Epinephrine is derived from tyrosine amino acid by the removal of the carboxyl group. It is a catecholamine.


9.

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
    iii i ii
  • a b c
    i iii ii
  • a b c
    ii i iii
  • a b c
    i ii iii

A.

 

a b c
iii i ii

10.

Which of the following is an occupational respiratory disorder?

  • Anthracis

  • Silicosis

  • Emphysema

  • Botulism


B.

Silicosis

Silicosis is due to excess inhalation of silica dust in the workers involved grinding or stone breaking industries.

Long exposure can give rise to inflammation leading to fibrosis and thus causing serious lung damage.

Anthrax is a serious infectious disease caused by Bacillus anthracis. It commonly affects domestic and wild animals. Emphysema is a chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased.

Botulism is a form of food poisoning caused by Clostridium botulinum.