When a protein-encoding gene is expressed in a heterologous host, it is called a:

Which of the following is correct for polymerase chain reaction $(\text{PCR})$?

In gel electrophoresis,at which end is the sample loaded?

The steps involved in the Southern blot test are as follows:
$I.$ $X-ray$ film
$II.$ Electrophoresis
$III.$ Digestion with restriction enzyme
$IV.$ Ethidium bromide
$V.$ Radioactive probe
Choose the option having the correct sequential order of these events.

Arrange the steps of $\text{rDNA}$ technology in the correct order$:-$
$(I.)$ Extraction of the desired gene product.
$(II.)$ Amplification of the gene of interest.
$(III.)$ Isolation of the desired $\text{DNA}$ fragment.
$(IV.)$ Ligation of the $\text{DNA}$ fragment into a vector.
$(V.)$ Insertion of $\text{rDNA}$ into the host.
The correct order is$:-$

Give information about bioreactors.