Multiple Choice Questions

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Age of fishes is also known as

  • Permian Era

  • Silurian Era

  • Devonian Era

  • Ordovician Era


C.

Devonian Era

The Devonian Perioid is known as 'the age of fishes'. It is famous for the thousands of species of fish that developed in Devonian sea. The Devonian Period of Palacozonic Era lasted from 417 million years ago to 354 million years ago.


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A hereditary disease which is never passed on from father to son is

  • X-chromosomal linked disease

  • Autosomal linked disease

  • Y chromosomal linked disease

  • None of the above


Alcoholism may leads to

  • Skin cancer

  • Liver cirrhosis

  • Viral disease

  • Eye Infection


Intermediate community between pioneer and climax communities is called

  • Seral community

  • Biotic community

  • Temporary community

  • Ecosphere


Vaccine for tuberculosis is known as

  • PAS vaccine

  • BCG vaccine

  • OPVA

  • DPT


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Amount of Co, in expired air is about

  • 0.04%

  • 0.03%

  • 4.5%

  • 21%


Sir Godfrey Hounsfield developed the diagonosi technique of

  • CT scanning

  • MRI

  • Endoscopy

  • Bronchoscopy


The codon for anticodon 3-UUUA-5' is

  • 3-AAU-5

  • 5-UAAA-3

  • 5-AAAU-3

  • 3-UAAU-5'


A kind of biotechnology involving manipulation of
DNA is

  • DNA replication

  • Genetic engineering

  • Denaturation

  • Renaturation


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Minamata disease is caused due to the presence of in water.

  • Cadmium

  • Lead

  • Arsenic

  • Mercury