What component is necessary to identify plants that integrate a transgene? a. promoter c. marker gene b. termination sequence d. bacterial vector

Ans. (c). marker gene.

A transgene is foreign gene or DNA molecule, which has been transferred to a host organism, naturally or artificially. The host cell, integrated with transgene is known as recombinant cell.

A marker gene is used to check whether the transgene has been successfully  integrated into the DNA of host cell. So, marker gene is a necessary component to identify plants, integrated with a transgene.

Thus, the correct answer is option (c).

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