Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

Which of the following is the part of mid brain of rabbit?

  • Diencephalon

  • Cerebrum

  • Corpora quadrigemina

  • None of the above


C.

Corpora quadrigemina

The dorsal part of mid brain (mesencephalon) is in the form of two pairs (i.e., four) of spherical optic lobes (corpora quadrigemina) located behind the pineal body optic lobes are reduced merely as reflex centres of visual and auditory.


12.

Which of the following assists in the locomotion of the organism stated

  • Epithelium of' Pheretima

  • Trichocysts of Paramecium

  • Pedicellaria of Star fish

  • Posterior sucker of Hirudinaria 


D.

Posterior sucker of Hirudinaria 

Hirudinaria belongs to class Hirudinea of phylum-Annelida.

It has definite number of body segments (26 + 7= 33). It feeds on blood (sanguivorous) and has anticoagulant hirudin in its saliva. Hirudinaria have a posterior sucker for locomotion. Leech creep by looping and swim by undulations of body.


13.

The scientist, who described the birds as glorified reptiles, was

  • Romer

  • Huxley

  •  Mendel

  • Robert Hooke


B.

Huxley

Huxley stated that birds are glorified reptiles. The missing link Archaeopteryx is a fossil lizard bird. It was founded by Andreas Wagner (1861) from upper Jurassic limestone rocks of Solenbofen in Bowaria, Germany


14.

Blood calcium level can be increased by the administration of

  • glucagon

  • thyroxine

  • parathormone

  • caleitonin


C.

parathormone

Parathyroid hormones are released when the level of ca is less in blood it increases level of ca in the blood while calcitocine hormones reciprocates the effect.


15.

Which of the following is a transparent tissue

  • Tendon

  • Hyaline cartilage

  • Fibrous cartilage

  • All of these


B.

Hyaline cartilage

Hyaline cartilage has a clear, homogenous, transparent bluish-green matrix. It gives glass like appearance. A few bundles of small white fibres are imbedded in the matrix. It is present in the end of limb bones (called hyaline caps).


16.

The epithelial lining in the alveoli of the frogs facing lung cavity is

  • squamous ciliated

  • columnar ciliated

  • columnar nonciliated

  • squamous nonciliated


B.

columnar ciliated

Alveoli is highly vascularised with an internal lining of very thin squamous epithelium, which always remain moist by mucus. The epithelial cells at the linar most margins of septa facing lung cavity are columnar and ciliated.


17.

Phospholipids are

  • amphipathic

  • hydrophobic

  • amphibolic

  • none of these


A.

amphipathic

The phospholipid is a bipolar molecule having long fatty acid called hydrophobic tail (water hating) or non-polar end. Another is hydrophillic (water loving) or polar end, hence, it is amphipathic in nature


18.

Which of the following is both exocrine and endocrine gland

  • Liver

  • Pancreas

  • Thyroid

  • Adrenal


B.

Pancreas

Pancreas are partially exocrine and partially endocrine gland.


19.

The first heart sound is produced when

  • diastole begins

  • semilunar valve close quickly

  • interventricular pressure decrease

  • bicuspid and tricuspid valve close quickly


D.

bicuspid and tricuspid valve close quickly

During working of heart two sounds are produced lub and dub. First sound (i.e., lub) is produced when auriculoventricular (tricuspid and bicuspid) valves are closed or at the end of diastole. The second sound (i.e., dub) is produced when semilunar valves at the base of dorsal aorta are closed or at the end of systole.


20.

Third cleavage of frog's development is

  • equatorial

  • vertical

  • latitudinal

  • none of these


C.

latitudinal

First and second cleavage in frog are holoblastic, complete, equal, vertical, whereas third cleavage is holoblastic, complete, unequal, latitudinal or horizontal and near the animal pole. It results in the formation of 8 cells of three are black micromeres which have less or no yolk, so divide faster and 4 are colourless macromeres