What is selectable marker?

What is selection.

If a recombinant DNA bearing gene for resistance to antibiotic ampicillin is transferred to E.coli cells, the host cells become transformed into ampicillin resistant cells. If such bacteria are transferred on agar plates containing ampicillin, only transformants will grown and the untransformed recipient cells will die. The ampicillin resistant gene in this case is called as 1) selectable marker 2) recombinant protein 3) cloning site 4) chemical scalpels

The function of a selectable marker is:

Name any three suitable 'selectable marker' for E.coli.

What is selective reabsorption? Give the substance reabsorbed by different segments of the nephron.

Match column I with column II and select the correct answer from the given codes. {:(Column I,Column II),(A.amp^(R) "gene",(i)"Artificial plasmid"),(B."Separation of DNA fragments",(ii)"Selectable marker"),(C."Hindlll",(iii)"Electrophoresis"),(D.pBR322,(iv)"Haemophilus influenzea"):}

A vector should ............. (i) contain suitable marker (ii) contain ori site (iii) have poly linkers (iv) be small in size

A manufacturer tested 7000 LED lights at random and found that 25 of them were defective . If a LED light is selected at random, what is the probability that the selected LED ligtht is a defective one .