The transfer of protein from electrophoretic gel to nitrocellulose membrane is known as

In Gene cloning:

Elution means

During the process of gene amplification using $PCR$,if very high temperature is not maintained in the beginning,then which of the following steps of $PCR$ will be affected first?

Study the following diagram of the Polymerase Chain Reaction $(PCR)$ and identify $A, B$ and $C$.

In a bioreactor,through which system can a small volume of culture be withdrawn periodically?