RNA STRUCTURE QUIZ

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

100 bp

80 bp

120 bp

140 bp

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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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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

in the anticodon loop and D stem loop

None of these

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

Bacteriophage DNA ligase

Human insulin

A restriction endonuclease from E. coli

Bacterial alpha-amylase

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The genetic material of retroviruses such as HIV is

DNA

all of these

protein

RNA

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The anticodon is a structure on

aribosome.

tRNA.

mRNA.

rRNA.

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Which of the following is the smallest of the RNAs?

All of these

Messenger RNA

Ribosomal RNAs

Transfer RNAs

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Retroviruses replicate via __________ intermediate

DNA

rDNA

RNA

mRNA

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RNA instability in alkaline solutions is due to

single strand nature

adenine

uracil

ribose

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Which of following RNA characteristically contains unusual purines and pyrimidmes?

nRNA

rRNA

mRNA

tRNA

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