The specific palindromic sequence recognized by $EcoRI$ is:

Which enzyme is obtained from $Thermus\ aquaticus$ for the Polymerase Chain Reaction $(PCR)$?

Which of the following statements are not true regarding restriction endonucleases?
$A$. They are called molecular scissors.
$B$. These are the enzymes responsible for restricting the growth of bacteriophages in $E. coli$.
$C$. They cut the $DNA$ only at the centre of the palindromic sites.
$D$. They remove nucleotides only from the ends of $DNA$ fragments.
$E$. They recognise specific palindromic base-pair sequences.
Choose the answer from the options given below:

Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?

In recombinant $DNA$ technique,the term vector refers to a

$pBR-322$ is frequently used as a cloning vector. What is it?