Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Microtubules are the constituent of

  • spindle fibres, centrioles and cilia

  • centrioles, spindle fibres and chromatin

  • centrosome, nucleosomes and centrioles

  • centrosome, nucleosomes and centrioles

10482 Views

2.

Mitochondria and choloroplast are :
I. semi-autonomous organelles.
II. formed by division of pre-existing  organelles and they contain DNA but lack protein synthesizing machinery. 

  • II is true but I is false

  • I is true but II is false

  • Both I and II are false

  • Both I and II are false

2617 Views

3.

Photosensitive compound in human eye is made up of

  • opsin and Retinal

  • opsin ans Retinol

  • transducin and Retinene

  • transducin and Retinene

2998 Views

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4.

Chrysophytes, euglenoids, dinoflagellates and slime moulds are included in the kingdom

  • Protista

  • Fungi

  • Animalia

  • Animalia


A.

Protista

All the single celled eukaryotic organism are grouped under the Kingdom Protista. These includes euglenoids, dinoflagellates, slime moulds and chrysophytes

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5.

The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the 

  • thermoacidophiles

  • methanogens

  • eubacteria

  • eubacteria

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6.

Which of the following characteristic features always holds true for the corresponding group of animals?

  • Viviparous Mamalia
  • Posess a mouth with an upper and lower jaw Chordata
  • 3-chmbered heart with one incompletely divided ventricle Reptilia
  • Cartiliginous- endoskeleton Chondrichthyes
2555 Views

7.

Tricarpellary, syncarpous gynoecium is found in flowers of

  • Solanaceae

  • Fabaceae

  • Poaceae

  • Poaceae

2093 Views

8.

In which of the following, all three are macronutrients

  • Iron, copper, molybdenum

  • Molybdenum, magnesium, manganese

  • Nitrogen, nickel, phosphorous

  • Nitrogen, nickel, phosphorous

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9.

Reduction in pH of blood will

  • reduce the blood supply to the brain

  • decrease the affinity of haemoglobin with oxygen

  • release bicarbonate ions by the liver

  • release bicarbonate ions by the liver

2760 Views

10.

Lack of relaxation between successive stimuli in sustained muscle contraction is known as

  • fatigue

  • tetanus

  • tonus

  • tonus

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