RNA STRUCTURE QUIZ

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

in the anticodon loop and D stem loop

in the anticodon loop and the 3' CCA end

None of these

in the T Loop and D stem and loop

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RNA instability in alkaline solutions is due to

ribose

uracil

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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Retroviruses replicate via __________ intermediate

mRNA

RNA

rDNA

DNA

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A nicked RNA molecule can be ligated by

T4 RNA ligase

T4 DNA ligase

all of these

DNA polymerase

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

140 bp

100 bp

120 bp

80 bp

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During RNA synthesis, the DNA template sequence 5'Tp Ap Gp Cp 3' Would be transcribed to produce which of the following RNA sequence?

5'-Gp Cp Tp Ap-3'

5'-Gp Cp Up Ap-3'

5'-Ap Up Cp Gp-3'

5'-Ap Tp Cp Gp-3'

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The anticodon is a structure on

rRNA.

tRNA.

aribosome.

mRNA.

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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 direct copy of a gene

It is a component of the ribosomes

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