Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

21.

Which one of the following animals is correctly matched with its particular named taxonomic category?

  • Cuttlefish - Mollusca, a class

  • Humans  - Primata, the family

  • Housefly - Musca, an order

  • Housefly - Musca, an order


D.

Housefly - Musca, an order

A group of individual organisms with fundamental similarities is called species. One species is distinguished from the other closely related species on the basis of distinct morphological differences. Tiger (Panthera tigris) is one of the species of Panthera.

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22.

A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissue. This O2

  • Raise the pCO2 of blood 75 mm of Hg.

  • Is enough to keep oxyhaemoglobin

  • helps in releasing more O2 to the epithelial tissues

  • helps in releasing more O2 to the epithelial tissues


D.

helps in releasing more O2 to the epithelial tissues

Our tissue is able to utilise only 25% of O2 carried by the arterial blood. The venous blood is still 75% saturated with O2. This O2 acts as a reserve during muscular exercise.

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23.

Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

  • Chordata - possess a mouth provided with an upper and a lower jaw

  • Chondrichthyes - possess cartilaginous endoskeleton

  • Mammalia - give birth to young ones

  • Mammalia - give birth to young ones


B.

Chondrichthyes - possess cartilaginous endoskeleton

The members of the class - Chondrichthyes are marine animals with a streamlined body and have a cartilaginous endoskeleton.

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24.

Ground tissue includes

  • all tissue except epidermis and vascular bundles

  • epidermis and cortex

  • all tissues internal to endodermis

  • all tissues internal to endodermis


A.

all tissue except epidermis and vascular bundles

All tissues except epidermis and vascular bundles constitute the ground tissue or fundamental tissue. It consists of simple tissues such as parenchyma, collenchyma and sclerenchyma. It includes cortex, pericycle, medullary rays, in leaves the ground tissue consists of the mesophyll.

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25.

In eubacteria, a cellular component that resembles eukaryotic cells is

  • nucleus

  • ribosomes

  • cell wall

  • cell wall


D.

cell wall

The plasma membrane of eubacteria resembles that of the eukaryotic cell. It is made phospholipid, protein and some amount of polysaccharides. However, it lacks sterol, the characteristic of the eukaryotic cell membrane. Instead, there is sterol kike hopanoid.

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26.

Which one of the following is not a part of a renal pyramid? 

  • Convoluted tubules

  • Collecting ducts

  • Loops Henle

  • Loops Henle


A.

Convoluted tubules

The convoluted tubule is the highly convoluted segments of the nephron in the renal labyrinth of the kidney. It is made up of the proximal tubule leading from the Bowmans capsule to the descending limb of Henle's loop and  the distal tubule leading from the ascending limb of Henle's loop to a collecting tubule.

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27.

In land plants, the guard cells differ from other epidermal cells in having

  • mitochondria

  • endoplasmic reticulum

  • chloroplasts

  • chloroplasts


C.

chloroplasts

The guard cells of stomata in land plants are specialised epidermal cells which contain chloroplasts. In rest of epidermal cells, chloroplasts are absent. But chloroplasts of guard cells are capable of poor photosynthesis as there is the absence of NADP reductase enzyme.

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28.

A drupe develop in 

  • Wheat

  • pea

  • tomato

  • tomato


D.

tomato

In mango, coconut, plum, etc., the fruit is known as drupe (stony fruit).They develop from monocarpellary, superior ovaries and are one seeded. In mango, the pericarp is well differentiated into an outer thin epicarp, a middle fleshy edible mesocarp and an inner stony hard endocarp.

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29.

Flowers are zygomorphic on 

  • Gulmohur

  • tomato

  • datura

  • datura


A.

Gulmohur

When a flower can be divided into two similar halves only in one particular vertical plane, it is called zygomorphic, e.g., bean, pea Gulmohur, cassia etc.

297 Views

30.

Which one of the following elements in plants is not remboilised?

  • Calcium

  • Potassium

  • Sulphur

  • Sulphur


A.

Calcium

An element like calcium are a part of a structural component of the cell and hence, are not released. The deficiency symptoms tend to appear first in the young tissue whenever the elements are not demobilised.

463 Views