NEET Biology Solved Question Paper 2009

Multiple Choice Questions

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Initiation codon is

  • UUU

  • UGA

  • AUG

  • UAG

C.

AUG

AUG codes for Methionine (Met) that is used as a start signal in protein syntheis. Hence, it is an initiation codon.

Also, in prokaryotes, codons GUG and UUG are the start codons.

UAA (ochre), UAG (amber) and UGA (opal) are the non- sense codons as they do not code for any amino acid. Their main function is to terminate the message for gene controlling protein synthesis. Therefore, termed as chain termination or stop codons.

UUU (uracil) codes for phenylalanine.

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    Streptomycin is obtained from

    • Streptomyces griseus

    • S. aureofaciens

    • S. venezuelae

    • S. ramosus

    Answer

    Lichen is the pioneer vegetation on which succession?

    • Hydrosere

    • Lithosere

    • Psammosere

    • Xerosere

    Answer

    Which is always present in photochemical smog?

    • O3

    • CO2

    • SO2

    • CH4

    Answer

    DNA element with ability to change position is called

    • cistron

    • transposon

    • intron

    • recon

    Answer
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    Cleavage polyembryony occurs in

    • Pinus

    • Mini Cycas

    • Cycas

    • Ephedra

    Answer

    DNA mutiplication is called

    • translation

    • replication

    • transduction

    • transcription

    Answer

    The soil which is transported by wind is known as

    • colluvial

    • eolian

    • aluvial

    • glacial soil

    Answer

    In Pinus, male cone bears a large number of

    • ligules

    • anthers

    • micro- sporophylls

    • mega- sporophylls

    Answer
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    Decomposers are

    • autotrophs

    • autoheterotrophs

    • organotrophs

    • heterotrophs

    Answer