Read the following statements and select the incorrect ones.
(i) When the transformed cells on agar plates containing ampicillin are spread, both transformed and untransformed cells with grow.
(ii) Restriction enzymes are used in isolation and separation of DNA from other macromolecules.
(iii) Downstream processing is one of the steps of rDNA technology.
(iv) Disarmed pathogen vectors are also used in transfer of rDNA into the host.

Options

A. (i) and (iii)
B. (iii) and (iv)
C. (i) and (iii)
D. (i) and (ii)

Answer

D

Explanation

Restriction enzymes are used to cut DNA at specific sites. When the transformed cells on agar plates containing ampicillin are spread, only transformants will grown, untransformed recipient cells will die.