RNA STRUCTURE QUIZ

The anticodon is a structure on

tRNA.

mRNA.

rRNA.

aribosome.

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

100 bp

140 bp

80 bp

120 bp

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

in the T Loop and D stem and loop

in the anticodon loop and D stem loop

None of these

in the anticodon loop and the 3' CCA end

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

A restriction endonuclease from E. coli

Bacteriophage DNA ligase

Bacterial alpha-amylase

Human insulin

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Retroviruses replicate via __________ intermediate

DNA

mRNA

rDNA

RNA

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Which of the following is the smallest of the RNAs?

Ribosomal RNAs

All of these

Messenger RNA

Transfer RNAs

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A nicked RNA molecule can be ligated by

all of these

DNA polymerase

T4 RNA ligase

T4 DNA ligase

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The genetic material of retroviruses such as HIV is

all of these

RNA

protein

DNA

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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

7-methyl-guanosine

1-methyl-adenosine

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What is the function of messenger RNA?

It is a component of the ribosomes

It carries amino acids

It is the genetic material of some organisms

It is a direct copy of a gene

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