RNA STRUCTURE QUIZ

What is the function of messenger RNA?

It carries amino acids

It is a component of the ribosomes

It is a direct copy of a gene

It is the genetic material of some organisms

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Retroviruses replicate via __________ intermediate

DNA

RNA

rDNA

mRNA

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

2'-O-methyl-guanosine

1-methyl-guanosine

7-methyl-guanosine

1-methyl-adenosine

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The anticodon is a structure on

tRNA.

rRNA.

mRNA.

aribosome.

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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 T Loop and D stem and loop

None of these

in the anticodon loop and D stem loop

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

Human insulin

Bacterial alpha-amylase

A restriction endonuclease from E. coli

Bacteriophage DNA ligase

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The genetic material of retroviruses such as HIV is

protein

RNA

DNA

all of these

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Which of the following is the smallest of the RNAs?

Transfer RNAs

Ribosomal RNAs

All of these

Messenger RNA

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

140 bp

100 bp

80 bp

120 bp

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Which of following RNA characteristically contains unusual purines and pyrimidmes?

mRNA

rRNA

nRNA

tRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

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