RNA STRUCTURE QUIZ

A nicked RNA molecule can be ligated by

T4 DNA ligase

DNA polymerase

all of these

T4 RNA ligase

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

2'-O-methyl-guanosine

1-methyl-adenosine

1-methyl-guanosine

7-methyl-guanosine

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The anticodon is a structure on

aribosome.

tRNA.

rRNA.

mRNA.

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

100 bp

80 bp

140 bp

120 bp

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What is the function of messenger RNA?

It is the genetic material of some organisms

It is a component of the ribosomes

It carries amino acids

It is a direct copy of a gene

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In RNA, uracil pairs with

thymine

cytosine

adenine

guanine

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The genetic material of retroviruses such as HIV is

DNA

all of these

RNA

protein

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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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RNA instability in alkaline solutions is due to

adenine

ribose

uracil

single strand nature

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The tertiary structure of yeast tRNA

All of these

is maintained mostly by non-Watson-Crick base pairing

involves extensive base stacking interactions

resembles the 3-dimensional structure of other tRNAs

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