NEET Biology Solved Question Paper 2008

Multiple Choice Questions

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Retrovirus have genetic material

  • DNA only

  • RNA only

  • DNA or RNA only

  • either DNA or RNA

B.

RNA only

Retrovirus is a RNA virus which infects animal cells and replicates by first converting to dsDNA with the help of enzyme reverse transcriptase. Retroviruses are enveloped viruses. AIDS is caused by HIV III (Human Immunodeficiency Virus), which is also a retrovirus.

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    Which of the following is not a Pyrimidine?

    • Thymine

    • Uracil

    • Guanine

    • Cytosine

    Answer

    One gene- one enzyme hypothesis of Beadle and Tatum was experimentally proved on

    • Saccharomyces 

    • Neurospora crassa

    • Lathyrus odoratus

    • Claviceps

    Answer

    Nitrifying bacteria are able to

    • convert atmospheric nitrogen into soluble forms

    • convert ammonia to nitrate

    • ammonia to nitrogen

    • nitrate to nitrogen

    Answer

    Bio- indicators are used for

    • oxygen demand

    • air pollution

    • mineral present

    • All of the above

    Answer
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    RNA is not found in

    • chromosome

    • plasmalemma

    • nucleolus

    • ribosome

    Answer

    Stop codons are

    • AUG, GUG

    • UAA, UGA, UAG

    • UAC, UGG

    • AGU, AGA, UAC

    Answer

    According to Kyoto protocol the major nations abide to reduce concentration of green house gases by

    • 2008

    • 2010

    • 2012

    • 2018

    Answer

    A lake with nutrients is called

    • trophic

    • euphotic

    • oligotrophic

    • eutrophic

    Answer
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    Study of Ecology of population is called

    • Autecology

    • Synecology

    • Ecotype

    • Demecology

    Answer