Many plasmids have Ampr marker. This implies

1.	Many plasmids have Ampr marker. This implies
A.	The plasmids contain genes for ampicillin biosynthesis
B.	Ampicillin is required for bacterial growth after transformation
C.	The plasmid contains the gene encoding -lactamase
D.	Ampicillin is essential for cell survival
Answer» D. Ampicillin is essential for cell survival

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Many plasmids have Ampr marker. This implies

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