RNA STRUCTURE QUIZ

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

Human insulin

A restriction endonuclease from E. coli

Bacterial alpha-amylase

Bacteriophage DNA ligase

TRUE ANSWER : ?
YOUR ANSWER : ?

In RNA, uracil pairs with

guanine

thymine

adenine

cytosine

TRUE ANSWER : ?
YOUR ANSWER : ?

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

100 bp

80 bp

140 bp

120 bp

TRUE ANSWER : ?
YOUR ANSWER : ?

The genetic material of retroviruses such as HIV is

all of these

RNA

protein

DNA

TRUE ANSWER : ?
YOUR ANSWER : ?

The tertiary structure of yeast tRNA

involves extensive base stacking interactions

is maintained mostly by non-Watson-Crick base pairing

All of these

resembles the 3-dimensional structure of other tRNAs

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1-methyl-adenosine

2'-O-methyl-guanosine

1-methyl-guanosine

7-methyl-guanosine

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the smallest of the RNAs?

Transfer RNAs

Messenger RNA

All of these

Ribosomal RNAs

TRUE ANSWER : ?
YOUR ANSWER : ?

A nicked RNA molecule can be ligated by

DNA polymerase

T4 DNA ligase

all of these

T4 RNA ligase

TRUE ANSWER : ?
YOUR ANSWER : ?

Retroviruses replicate via __________ intermediate

DNA

RNA

rDNA

mRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of following RNA characteristically contains unusual purines and pyrimidmes?

nRNA

rRNA

tRNA

mRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

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