Multiple Choice Questions

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Which part of an animal virus is not reproduced in multiple copies?

  • Capsid

  • Protein

  • Envelope

  • Ribosome


D.

Ribosome

Virus is a nucleoprotein particle. It is made up of an outermost covering known as envelope, a protein coat, ie, capsid and a core of nucleic acid. During its reproduction, multiple cpoies of envelope capsid and nucleic acids are formed inside the host cells.

Since, ribosomes are absent in virus cells. Therefore, they are not reproduced during reproduction of viruses.


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Most primitive member, in which roots are not present, is

  • Psilotum

  • Rhynia

  • Lycopodium

  • Selaginella


Nucleic acid is absent in

  • Virus

  • Viroid

  • Prion

  • Mycoplasma


Thigmotaxis is not shown by

  • Paramecium

  • Amoeba

  • Ascaris

  • Hydra


Polyp phase is absent in

  • Hydra

  • Aurelia

  • Physalia

  • Obelia


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The process which cannot take place in the absence of viruses is

  • transformation

  • conjugation

  • translocation

  • transduction


Contractile vacuole in protozoan Amoeba is meant for

  • respiration

  • excretion

  • locomotion

  • osmoregulation


In Whittaker's system of classification, prokaryotes belong to the kingdom

  • Monera

  • Protista

  • Animalia

  • Fungi


Entamoeba histolytica differs from Amoeba in absence of 

  • pseudopodia

  • contractile vacuole

  • nucleus

  • ectoplasm


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Edible part of mushroom is

  • basidiocarp

  • secondary mycelium

  • primary mycelium

  • tertiary mycelium


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