RNA STRUCTURE QUIZ

A nicked RNA molecule can be ligated by

T4 DNA ligase

DNA polymerase

T4 RNA ligase

all of these

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

1-methyl-guanosine

2'-O-methyl-guanosine

1-methyl-adenosine

7-methyl-guanosine

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Which of the following is the smallest of the RNAs?

Transfer RNAs

All of these

Messenger RNA

Ribosomal RNAs

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The anticodon is a structure on

rRNA.

mRNA.

tRNA.

aribosome.

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RNA instability in alkaline solutions is due to

uracil

ribose

single strand nature

adenine

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

Human insulin

Bacterial alpha-amylase

Bacteriophage DNA ligase

A restriction endonuclease from E. coli

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What is the function of messenger RNA?

It carries amino acids

It is the genetic material of some organisms

It is a component of the ribosomes

It is a direct copy of a gene

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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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In RNA, uracil pairs with

thymine

guanine

adenine

cytosine

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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

None of these

in the T Loop and D stem and loop

in the anticodon loop and D stem loop

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