RNA STRUCTURE QUIZ

The genetic material of retroviruses such as HIV is

DNA

RNA

protein

all of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1-methyl-guanosine

2'-O-methyl-guanosine

1-methyl-adenosine

7-methyl-guanosine

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of following RNA characteristically contains unusual purines and pyrimidmes?

rRNA

nRNA

tRNA

mRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Bacterial alpha-amylase

Human insulin

Bacteriophage DNA ligase

A restriction endonuclease from E. coli

TRUE ANSWER : ?
YOUR ANSWER : ?

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

140 bp

100 bp

120 bp

80 bp

TRUE ANSWER : ?
YOUR ANSWER : ?

In RNA, uracil pairs with

cytosine

thymine

adenine

guanine

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the function of messenger RNA?

It is a direct copy of a gene

It carries amino acids

It is a component of the ribosomes

It is the genetic material of some organisms

TRUE ANSWER : ?
YOUR ANSWER : ?

A nicked RNA molecule can be ligated by

T4 DNA ligase

all of these

DNA polymerase

T4 RNA ligase

TRUE ANSWER : ?
YOUR ANSWER : ?

Two features of the tRNA molecule associated, in converting the triplet codon to an amino acid, are

None of these

in the anticodon loop and D stem loop

in the anticodon loop and the 3' CCA end

in the T Loop and D stem and loop

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the smallest of the RNAs?

Transfer RNAs

All of these

Ribosomal RNAs

Messenger RNA

TRUE ANSWER : ?
YOUR ANSWER : ?

↑