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

1-methyl-guanosine

7-methyl-guanosine

1-methyl-adenosine

2'-O-methyl-guanosine

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In RNA, uracil pairs with

cytosine

guanine

adenine

thymine

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The genetic material of retroviruses such as HIV is

RNA

all of these

DNA

protein

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

Bacteriophage DNA ligase

Human insulin

Bacterial alpha-amylase

A restriction endonuclease from E. coli

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What is the function of messenger RNA?

It is a component of the ribosomes

It carries amino acids

It is the genetic material of some organisms

It is a direct copy of a gene

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The anticodon is a structure on

aribosome.

tRNA.

rRNA.

mRNA.

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A nicked RNA molecule can be ligated by

DNA polymerase

T4 DNA ligase

T4 RNA ligase

all of these

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The tertiary structure of yeast tRNA

involves extensive base stacking interactions

All of these

is maintained mostly by non-Watson-Crick base pairing

resembles the 3-dimensional structure of other tRNAs

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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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