Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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11.

Which one of the following is a growth regulator produced by plants?

  • Naphthalene acetic acid

  • Zeatin

  • 2,4-dichlorophenoxy acetic acid

  • Benzyl aminopurine


B.

Zeatin

Zeatin is a naturally occurring cytokinin (type of plant growth regulator) isolated from the endosperm of a corn. It is remarkably known to be more active than any other cytokinin, while others growth regulators given in the, potions such as 2, 4 dichlorophenoxy acetic acid (2, 4-D), Naphthalene Acetic Acid (NAA) and benzylaminopurine are all synthetic plant growth regulators.


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12.

In apple, the edible portion is

  • mesocarp

  • epicarp

  • endocarp

  • thalamus


13.

In which one of the following, expenditure of energy is required?

  • Osmosis

  • Diffusion

  • Active transport

  • Passive transport


14.

The protein component of a holoenzyme is known as

  • coenzyme

  • cofactor

  • prosthetic group

  • apoenzyme


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15.

Km is

  • product

  • enzyme

  • constant

  • unit


16.

Juvenile hormone in insect is released from

  • protocerebrum

  • corpora cardiaca

  • corpora allata

  • thoracic gland


17.

The body of Rohu fish is covered by

  • cycloid scale, but the tail of homocercal

  • placoid scale, but the tail of heterocercal

  • cycloid scale, but the tail of heterocerca

  • placoid scale, but the tail is homocercal


18.

Management of National Park is controlled by

  • State Government

  • Central Government

  • United Nations

  • Non-Government Organisations


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19.

Which one is an example of living fossil?

  • Coral

  • Ascidia

  • Octopus

  • King crab


20.

Objects less than 0.2 μm in size cannot be see an under light microscope because

  • the wave length of visible light is 3900- 7800 Å

  • only two types of lenses are used

  • maximum magnifying power of ocular lens is 20 X

  • maximum magnifying power of objective lens is 100 X


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