Which of the following is used in recombinant $DNA$ technology?

Identify the wrong statement with regard to Restriction Enzymes.

By what other name is the gene gun known?

Which of the following statements is correct regarding the gel electrophoresis technique?

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:

The polymerase chain reaction $(PCR)$ technology was discovered by