Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

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

  • thermoacidophiles

  • methanogens

  • eubacteria

  • eubacteria


B.

methanogens

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

1842 Views

2.

Tricarpellary, syncarpous gynoecium is found in flowers of

  • Solanaceae

  • Fabaceae

  • Poaceae

  • Poaceae


D.

Poaceae

Tricarpellary, syncarpous gynoecium is found in flowers of

2093 Views

3.

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

  • fatigue

  • tetanus

  • tonus

  • tonus


B.

tetanus

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

3705 Views

4.

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


B.

I is true but II is false

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. 

2617 Views

5.

Photosensitive compound in human eye is made up of

  • opsin and Retinal

  • opsin ans Retinol

  • transducin and Retinene

  • transducin and Retinene


A.

opsin and Retinal

Photosensitive compound in human eye is made up of

2998 Views

6.

Microtubules are the constituent of

  • spindle fibres, centrioles and cilia

  • centrioles, spindle fibres and chromatin

  • centrosome, nucleosomes and centrioles

  • centrosome, nucleosomes and centrioles


A.

spindle fibres, centrioles and cilia

Microtubules are the constituent of

10482 Views

7.

In which of the following, all three are macronutrients

  • Iron, copper, molybdenum

  • Molybdenum, magnesium, manganese

  • Nitrogen, nickel, phosphorous

  • Nitrogen, nickel, phosphorous


C.

Nitrogen, nickel, phosphorous

In which of the following, all three are macronutrients

2473 Views

8.

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

C.

3-chmbered heart with one incompletely divided ventricle Reptilia

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

2555 Views

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


B.

decrease the affinity of haemoglobin with oxygen

Reduction in pH of blood will

2760 Views

10.

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

  • Protista

  • Fungi

  • Animalia

  • Animalia


A.

Protista

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

2220 Views