RNA STRUCTURE QUIZ

The anticodon is a structure on

rRNA.

aribosome.

mRNA.

tRNA.

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Which of the following is the smallest of the RNAs?

All of these

Transfer RNAs

Messenger RNA

Ribosomal RNAs

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RNA instability in alkaline solutions is due to

adenine

single strand nature

uracil

ribose

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

Bacteriophage DNA ligase

Human insulin

Bacterial alpha-amylase

A restriction endonuclease from E. coli

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What modified base is at the 5' extremity of a capped eukaryotic m-RNA?

1-methyl-adenosine

7-methyl-guanosine

2'-O-methyl-guanosine

1-methyl-guanosine

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In RNA, uracil pairs with

adenine

thymine

cytosine

guanine

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The tertiary structure of yeast tRNA

All of these

resembles the 3-dimensional structure of other tRNAs

is maintained mostly by non-Watson-Crick base pairing

involves extensive base stacking interactions

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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 D stem loop

None of these

in the anticodon loop and the 3' CCA end

in the T Loop and D stem and loop

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

100 bp

120 bp

80 bp

140 bp

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Retroviruses replicate via __________ intermediate

rDNA

mRNA

RNA

DNA

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