RNA STRUCTURE QUIZ

Which of following RNA characteristically contains unusual purines and pyrimidmes?

tRNA

mRNA

nRNA

rRNA

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The anticodon is a structure on

rRNA.

mRNA.

tRNA.

aribosome.

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Retroviruses replicate via __________ intermediate

mRNA

RNA

rDNA

DNA

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Which of the following is the smallest of the RNAs?

Transfer RNAs

Messenger RNA

Ribosomal RNAs

All of these

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The mRNA from which of the following would contain a poly-A tail?

Bacteriophage DNA ligase

A restriction endonuclease from E. coli

Bacterial alpha-amylase

Human insulin

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The genetic material of retroviruses such as HIV is

DNA

RNA

protein

all of these

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Two features of the tRNA molecule associated, in converting the triplet codon to an amino acid, are

in the anticodon loop and the 3' CCA end

in the anticodon loop and D stem loop

in the T Loop and D stem and loop

None of these

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What is the average size (in bp) of a mature t-RNA?

100 bp

140 bp

120 bp

80 bp

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What is the function of messenger RNA?

It is a direct copy of a gene

It is a component of the ribosomes

It carries amino acids

It is the genetic material of some organisms

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The tertiary structure of yeast tRNA

is maintained mostly by non-Watson-Crick base pairing

involves extensive base stacking interactions

resembles the 3-dimensional structure of other tRNAs

All of these

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