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NEET Biology Solved Question Paper 2016

Multiple Choice Questions

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

Identify the given structure

Adenylic acid
Uracil
Cholesterol
Adenosine

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

Pseudostratified epithelium is found in

seminiferous tubule
Fallopian tube
trachea
kidney tubules

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, Po₂= 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.

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

Retrogressive metamorphosis occurs in

Hemichordata
Cephalochordata
Urochordata
Vertebrata

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

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.

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

Each muscle fibre has many parallely arranged myofibrils. Each myofibril contains many serially arranged units called sarcomere which are the functiorial units. Each sarcomere has a central 'A' band made of thick myosin filaments, and two half 'T' bands made of thin actin filaments on either side of it marked by Z' lines. In a resting state, the edges of thin filaments on either side of the thick filaments partially overlap the free ends of the thick filaments leaving the central part of the thick filaments. This central part of thick filament, not overlapped by thin filaments is called the 'H' zone.