RNA STRUCTURE QUIZ

Retroviruses replicate via __________ intermediate

RNA

DNA

rDNA

mRNA

TRUE ANSWER : ?
YOUR ANSWER : ?

A nicked RNA molecule can be ligated by

DNA polymerase

all of these

T4 DNA ligase

T4 RNA ligase

TRUE ANSWER : ?
YOUR ANSWER : ?

In RNA, uracil pairs with

cytosine

adenine

thymine

guanine

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 : ?

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

120 bp

80 bp

140 bp

100 bp

TRUE ANSWER : ?
YOUR ANSWER : ?

RNA instability in alkaline solutions is due to

single strand nature

uracil

ribose

adenine

TRUE ANSWER : ?
YOUR ANSWER : ?

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

7-methyl-guanosine

2'-O-methyl-guanosine

1-methyl-guanosine

1-methyl-adenosine

TRUE ANSWER : ?
YOUR ANSWER : ?

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

in the T Loop and D stem and loop

in the anticodon loop and D stem loop

in the anticodon loop and the 3' CCA end

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

The genetic material of retroviruses such as HIV is

protein

DNA

RNA

all of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Human insulin

Bacteriophage DNA ligase

Bacterial alpha-amylase

A restriction endonuclease from E. coli

TRUE ANSWER : ?
YOUR ANSWER : ?

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