RNA STRUCTURE QUIZ

What is the function of messenger RNA?

It is a direct copy of a gene

It carries amino acids

It is the genetic material of some organisms

It is a component of the ribosomes

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The genetic material of retroviruses such as HIV is

RNA

DNA

all of these

protein

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

A restriction endonuclease from E. coli

Bacterial alpha-amylase

Bacteriophage DNA ligase

Human insulin

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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'-Ap Tp Cp Gp-3'

5'-Gp Cp Up Ap-3'

5'-Gp Cp Tp Ap-3'

5'-Ap Up Cp Gp-3'

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

2'-O-methyl-guanosine

7-methyl-guanosine

1-methyl-guanosine

1-methyl-adenosine

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

80 bp

120 bp

100 bp

140 bp

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Which of following RNA characteristically contains unusual purines and pyrimidmes?

tRNA

nRNA

mRNA

rRNA

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Which of the following is the smallest of the RNAs?

Messenger RNA

All of these

Ribosomal RNAs

Transfer RNAs

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The anticodon is a structure on

aribosome.

rRNA.

mRNA.

tRNA.

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Retroviruses replicate via __________ intermediate

DNA

rDNA

mRNA

RNA

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