PETROLEUM REFINERY ENGINEERING QUIZ

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

Bacterial alpha-amylase

A restriction endonuclease from E. coli

Bacteriophage DNA ligase

Human insulin

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

7-methyl-guanosine

1-methyl-guanosine

TRUE ANSWER : ?
YOUR ANSWER : ?

Retroviruses replicate via __________ intermediate

DNA

rDNA

mRNA

RNA

TRUE ANSWER : ?
YOUR ANSWER : ?

The genetic material of retroviruses such as HIV is

all of these

protein

RNA

DNA

TRUE ANSWER : ?
YOUR ANSWER : ?

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'-Gp Cp Tp Ap-3'

5'-Gp Cp Up Ap-3'

5'-Ap Up Cp Gp-3'

TRUE ANSWER : ?
YOUR ANSWER : ?

A nicked RNA molecule can be ligated by

T4 RNA ligase

all of these

T4 DNA ligase

DNA polymerase

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of following RNA characteristically contains unusual purines and pyrimidmes?

mRNA

nRNA

tRNA

rRNA

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

None of these

in the anticodon loop and D stem loop

in the anticodon loop and the 3' CCA end

TRUE ANSWER : ?
YOUR ANSWER : ?

The anticodon is a structure on

rRNA.

mRNA.

tRNA.

aribosome.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the smallest of the RNAs?

All of these

Ribosomal RNAs

Messenger RNA

Transfer RNAs

TRUE ANSWER : ?
YOUR ANSWER : ?

↑