RNA STRUCTURE QUIZ

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

120 bp

100 bp

80 bp

140 bp

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What is the function of messenger RNA?

It is a component of the ribosomes

It carries amino acids

It is a direct copy of a gene

It is the genetic material of some organisms

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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 tertiary structure of yeast tRNA

is maintained mostly by non-Watson-Crick base pairing

resembles the 3-dimensional structure of other tRNAs

involves extensive base stacking interactions

All of these

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Which of the following is the smallest of the RNAs?

All of these

Ribosomal RNAs

Messenger RNA

Transfer RNAs

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Which of following RNA characteristically contains unusual purines and pyrimidmes?

tRNA

nRNA

mRNA

rRNA

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RNA instability in alkaline solutions is due to

uracil

ribose

single strand nature

adenine

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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 anticodon loop and D stem loop

in the T Loop and D stem and loop

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The genetic material of retroviruses such as HIV is

RNA

all of these

DNA

protein

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In RNA, uracil pairs with

guanine

cytosine

thymine

adenine

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