RNA STRUCTURE QUIZ

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

Human insulin

Bacteriophage DNA ligase

A restriction endonuclease from E. coli

Bacterial alpha-amylase

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of following RNA characteristically contains unusual purines and pyrimidmes?

tRNA

mRNA

rRNA

nRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

In RNA, uracil pairs with

cytosine

guanine

adenine

thymine

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Which of the following is the smallest of the RNAs?

Messenger RNA

Ribosomal RNAs

All of these

Transfer RNAs

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The anticodon is a structure on

mRNA.

rRNA.

tRNA.

aribosome.

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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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RNA instability in alkaline solutions is due to

single strand nature

ribose

adenine

uracil

TRUE ANSWER : ?
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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

All of these

involves extensive base stacking interactions

is maintained mostly by non-Watson-Crick base pairing

resembles the 3-dimensional structure of other tRNAs

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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

TRUE ANSWER : ?
YOUR ANSWER : ?

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