A Scientist Has Been Growing a Bacterial Strain for Some

Multiple Choice

A scientist has been growing a bacterial strain for some time in culture media containing very few nutrients.The cells are growing slowly,so she enriches the media with amino acids and carbohydrates.To her dismay,instead of growing faster and to higher densities,the bacteria begin to die.What has caused this strange result?

A) a prophage switched from the lysogenic cycle to the lytic cyle
B) a prophage switched from the lytic cycle to the lysogenic cycle
C) the bacteria are infected with a temperate phage
D) the bacteria are infected with a virulent phage that has switched from the lysogenic cycle to the lytic cycle
E) the bacteria are infected with a temperate phage that has switched from the lysogenic cycle to the lytic cycle