NEET Biology Solved Question Paper 2009

Multiple Choice Questions

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DNA mutiplication is called

  • translation

  • replication

  • transduction

  • transcription

B.

replication

DNA multiplication takes place by replication at S- phase of interphase during cell cycle. It is semi- conservative in nature.

Transcription is the mode by which DNA passes its genetic information to mRNA. It is the first step in protein synthesis which takes place in nucleus of eukaryotic cells.

Translation is the synthesis of a chain of polypeptide by mRNA. It takes place at the site of ribosomes and involves three steps- Initiation, Elonagtion and Termination.

Transduction is the transfer of genes from one bacterial cell to another by means of a virus.

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    Streptomycin is obtained from

    • Streptomyces griseus

    • S. aureofaciens

    • S. venezuelae

    • S. ramosus

    Answer

    DNA element with ability to change position is called

    • cistron

    • transposon

    • intron

    • recon

    Answer

    Initiation codon is

    • UUU

    • UGA

    • AUG

    • UAG

    Answer

    Which is always present in photochemical smog?

    • O3

    • CO2

    • SO2

    • CH4

    Answer
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    The soil which is transported by wind is known as

    • colluvial

    • eolian

    • aluvial

    • glacial soil

    Answer

    Lichen is the pioneer vegetation on which succession?

    • Hydrosere

    • Lithosere

    • Psammosere

    • Xerosere

    Answer

    In Pinus, male cone bears a large number of

    • ligules

    • anthers

    • micro- sporophylls

    • mega- sporophylls

    Answer

    Decomposers are

    • autotrophs

    • autoheterotrophs

    • organotrophs

    • heterotrophs

    Answer
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    Cleavage polyembryony occurs in

    • Pinus

    • Mini Cycas

    • Cycas

    • Ephedra

    Answer