Select the correct pair :

Which one of the following palindromic base sequences in $DNA$ can be easily cut at about the middle by some particular restriction enzyme?

Given below are two statements:

Statement $I:$

Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence.

Statement $II:$

Restriction endonucleases cut the $DNA$ strand a little away from the centre of the palindromic site.

In the light of the above statements, choose the most

appropriate answer from the options given below :

Consider the following statements

$I.$ In microinjection method foreign $DNA$ is directly injected into the nucleus of animal cell or plant cell by using micro needles or micro pipettes

$II.$ Microinjection method is used in oocytes, eggs and embryo

$III.$ Electroporation is the formation of temporary pores in the plasma membrane of host cell by using lysozyme or calcium chloride

$IV.$ In chemical mediated gene transfer method certain chemicals such as $\mathrm{CO}_{2}$ help foreign $DNA$ to enter the host cell

Which of the statements given above are correct?

Restriction endonucleases are enzymes which