RNA STRUCTURE QUIZ

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

1-methyl-adenosine

1-methyl-guanosine

2'-O-methyl-guanosine

7-methyl-guanosine

TRUE ANSWER : ?
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Which of following RNA characteristically contains unusual purines and pyrimidmes?

nRNA

mRNA

tRNA

rRNA

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

A restriction endonuclease from E. coli

Human insulin

Bacterial alpha-amylase

Bacteriophage DNA ligase

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A nicked RNA molecule can be ligated by

T4 DNA ligase

all of these

DNA polymerase

T4 RNA ligase

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RNA instability in alkaline solutions is due to

adenine

ribose

uracil

single strand nature

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In RNA, uracil pairs with

cytosine

adenine

thymine

guanine

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Retroviruses replicate via __________ intermediate

RNA

DNA

rDNA

mRNA

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The tertiary structure of yeast tRNA

is maintained mostly by non-Watson-Crick base pairing

involves extensive base stacking interactions

resembles the 3-dimensional structure of other tRNAs

All of these

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What is the function of messenger RNA?

It is the genetic material of some organisms

It is a direct copy of a gene

It carries amino acids

It is a component of the ribosomes

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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'-Ap Up Cp Gp-3'

5'-Gp Cp Tp Ap-3'

5'-Gp Cp Up Ap-3'

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