Molecular Basis of Inheritance

Multiple Choice Questions

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Stop codons are

  • AUG, GUG

  • UAA, UGA, UAG

  • UAC, UGG

  • AGU, AGA, UAC

B.

UAA, UGA, UAG

There are three stop codons or non- sense codons UAG, UAA and UGA.

AUG is an initiation codon in both prokaryotes and eukaryotes.

UAC codes for tyrosine, UGG codes for tryptophan, AGU codes for serine and AGA codes for argenine.

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    In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids?

    • 61

    • 60

    • 20

    • 64

    Answer

    Role of carbohydrate in protoplasm

    • as catalyst

    • for energy

    • as enzymes

    • for synthesis

    Answer

    The number of RNA molecules in 60S sub- particles of 80S ribosomes are

    • five 

    • four

    • three

    • two

    Answer

    During translation initiation in prokaryotes, a GTP molecule is needed in

    • association of 30S, mRNA with formyl-met-tRNA

    • association of 50S subunit of ribosome with initiation complex

    • formation of formyl-met-tRNA

    • binding of 30S subunit of ribosome with mRNA

    Answer
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    Which one of the following codons codes for the some information as UGC?

    • UGU

    • UGA

    • UAG

    • UGG

    Answer

    DNA multiplication is called

    • translation

    • replication

    • transduction

    • transcription

    Answer

    Ribosomal RNA (rRNA) is synthesized in

    • nucleolus

    • nucleosome

    • cytoplasm

    • ribosome

    Answer

    DNA is specific because it has

    • number of nucleotides

    • specific nature of phosphate and sugar

    • arrangement of protein in DNA

    • specific nature of purine and pyrimidines

    Answer
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    The RNA found in eukaryotic ribosomes are

    • 5 S and 16 S RNA

    • 5 S, 16 S, 18 S RNA

    • 23S, 16 S, RNA

    • 5 S and 28 S RNA

    Answer
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