Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following are homosporous pteridophytes?

I. Selaginella

II. Lycopodium

III. Salvinia

IV. Equisetum

  • I and IV only

  • II and III only

  • II and IV only

  • III and IV only


2.

Identify the given structure

  • Adenylic acid

  • Uracil

  • Cholesterol

  • Adenosine


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3.

Cornea transplant in humans is almost never rejected. This is because

  • it is composed of enucleated cells

  • it is a non-living layer

  • its cells are least penetrable by bacteria

  • it has no blood supply


D.

it has no blood supply

Cornea is a tranparent layer of tissue continuous with sclerotic that forms the front part of vertebrae eye over the iris and lens. It refracts light waves entering the eye onto lens. Cornea is avascular (ie, it has no blood supply). It is one of the first organs to be successfully transplanted because it lacks blood vessels.


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4.

Pseudostratified epithelium is found in

  • seminiferous tubule

  • Fallopian tube

  • trachea

  • kidney tubules


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5.

The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the labels along with their functions and select the correct option.

  • C- Vena Cava - takes blood from body parts to right atrium, Pco2 = 45 mm Hg

  • D- Dorsal aorta - takes blood from heart to body parts, Po= 95 mm Hg

  • A- Pulmonary vein - takes impure blood from body parts to heart, Po2 = 60 mm Hg

  • B- Pulmonary artery - takes blood from heart to lungs, Po2= 90 mm Hg.


6.

Which one of the following is not a mammalian character?

  • Presence of milk producing glands

  • Skin is unique in possessing hair

  • Presence of external ears called pinnae

  • Homodont type of dentition


7.

Retrogressive metamorphosis occurs in

  • Hemichordata

  • Cephalochordata

  • Urochordata

  • Vertebrata


8.

One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third hormone increases the tolerance of plants to various stresses. They are respectively

  • Gibberellin, Auxin, Ethylene

  • Auxin, Gibberellin, Cytokinin

  • Gibberellin, Auxin, ABA

  • Auxin, Gibberellin, ABA


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9.

The H-zone in the skeletal muscle fibre is due to

  • the central gap between actin filaments extending through myosin filaments in the A-band

  • extension of myosin filaments in the central portion ofthe A-band

  • the absence of myofibrils in the central portion of A-band

  • the central gap between myosin filaments in the A-band.


10.

The volume of 'anatomical dead space' air is normally

  • 230 mL

  • 210 mL

  • 190 mL

  • 150 mL


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