For gene trap vector system, reporter gene and _____ are present. Reporter gene is _____

For gene trap vector system, reporter gene and _____ are present. Reporter gene is _____

Q. For gene trap vector system, reporter gene and _____ are present. Reporter gene is _____

A.            selectable marker, having promoter

B.            selectable marker, promoterless

C.            helper phage, promoterless

D.            helper phage, having promoter

Answer: selectable marker, promoterless

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