Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

51.

Enzyme and carbohydrates dominate in the digestive tract of

  • carnivores

  • omnivores

  • parasites

  • herbivores


52.

The first animal domesticated by primitive man was

  • dog

  • horse

  • cat

  • cow


53.

If there are 4 microspore mother cells in an anther, what will be the number of pollen grains?

  • 4

  • 8

  • 12

  • 16


54.

The correct sequence for the formation of chemicals on the primitive earth is

  • NH3, protein, carbohydrate and nucleic acid

  • NH3, water, nucleic acids and proteins

  • NH3, nucleic acids, protein and carbohydrate

  • protein, carbohydrate, water and nucleic acids


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55.

Which country has the greatest contribution for the hole formation in ozone layer?

  • USA

  • Germany

  • Russia

  • Japan


56.

Radio-tracer technique shows that DNA is in

  • single-helix stage

  • double-helix stage

  • multi-helix stage

  • none of these


57.

When paternal and maternal chromosomes change their materials with each other in cell division this event is called

  • synapsis

  • crossing over

  • bivalent forming

  • dyad- forming


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58.

AIDS disease was first reported in

  • Russia

  • Germany

  • USA

  • France


C.

USA

AIDS was first reported from USA in 1981.


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59.

When a natural predator (living being) is applied on the other pathogen organism to control them, this process is called

  • biological control

  • genetic engineering

  • artificial control

  • confusion technique


60.

The 10% energy transfer law of food chain was given by

  • Stanley

  • Weismann

  • Lindemann

  • Tansley


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