Refer to the Figure Showing the Use of Transposons as Mutagens

Multiple Choice

Refer to the figure showing the use of transposons as mutagens in Mycoplasma genitalium. Which statement is true?

A) Gene A is essential, because there was growth when gene A was mutagenized.
B) Gene A is not essential, because there was growth when gene A was mutagenized.
C) Gene A is not essential, because there was no growth when gene A was mutagenized.
D) Gene A is essential, because there was no growth when gene A was mutagenized.
E) Whether gene A is essential or not depends on gene B.