Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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41.

Arbor-vitae is composed of

  • grey matter

  • neurogleal cells

  • white matter

  • all of the the above


A.

grey matter

The arbor vitae (Latin for "tree of life") is the cerebellar white matter, so called for its branched, tree-like appearance. In some ways it more resembles a fern and is present in both cerebellar hemispheres. It brings sensory and motor information to and from the cerebellum.

In cerebellum strips of white matter profusely ramify into the folds of grey matter. This system of branched strips of white matter within each cerebellar hemisphere is called Arbor-vitae".


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42.

The main difference between white and yellow fibres is of

  • protein

  • colour of fibres

  • both (a) and (b)

  • none of the above


43.

Lenticular transpiration takes place in

  • fruits

  • woody stems

  • leaves

  • all of these


44.

Which of the following is not found in vertebrates

  • Bilateral symmetry

  • Gill opening

  • Body scales

  • Cnidoblasts


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45.

In which of the following process 36 ATP molecules are produced by per hexose molecule

  • Glycolysis

  • Krebs' cycle

  • Direct oxidation pathway

  • None of the above


46.

The value of RQ at compensation point is

  • unity

  • infinity

  • > 1 

  • zero


47.

The vitamin present in Coenzyme is

  • B2

  • niacin

  • pyridoxine

  • pantothenic acid


48.

Symbiotic bacteria present in intestine of most primates, which synthesize certain vitamins are

  • Entamoeba histolytic

  • Entamoeba coli

  • Entamoeba gingivali

  • None of the above


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49.

In which form CO2 is mostly carried by blood

  •  bicarbonate

  • carbonic acid

  • Carbamino compound

  • Carboxyhaemoglobin


50.

Which artery is absent in frog

  • Right systemic arch

  • Phrenic artery

  • Carotid artery

  • Renal artery


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