Multiple Choice Questions

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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


D.

5 S and 28 S RNA

Eukaryotic ribosomes have two unequal subunits, small subunit (40S) and large subunit (60S). Large subunit consists of 28S rRNA and 5S rRNA. It also consists of 5.8S rRNA. Small subunit consists of 18S rRNA.


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DNA multiplication is called

  • translation

  • replication

  • transduction

  • transcription


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

  • 61

  • 60

  • 20

  • 64


Ribosomal RNA (rRNA) is synthesized in

  • nucleolus

  • nucleosome

  • cytoplasm

  • ribosome


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


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

  • UGU

  • UGA

  • UAG

  • UGG


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

  • five 

  • four

  • three

  • two


Stop codons are

  • AUG, GUG

  • UAA, UGA, UAG

  • UAC, UGG

  • AGU, AGA, UAC


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


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Role of carbohydrate in protoplasm

  • as catalyst

  • for energy

  • as enzymes

  • for synthesis


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