A Strain of E

Multiple Choice

A strain of E.coli has the genotype (and phenotype) leu^- lac^-.This notation means that this strain if bacteria is unable to:

A) metabolize the amino acid leucine and synthesize the sugar lactose.
B) utilize the amino acid leucine and synthesize the sugar lactose.
C) utilize the amino acid leucine and the sugar lactose.
D) synthesize the amino acid leucine and utilize the sugar lactose.
E) synthesize the amino acid leucine and the sugar lactose.