According to Griffith's 1928 experiments with Streptococcus pneumoniae and mice, some of the isolated strains of S. pneumoniae were lethal when injected into mice and some were not. An injection of type IIR bacteria was not lethal, but an injection of type IIIS was lethal. An injection of heat-killed type IIIS bacteria was no longer lethal. However, injecting a mix of both heat-killed type IIIS bacteria and live type IIR bacteria into mice was lethal. Blood analysis of the mice revealed live type IIIS bacteria.
Suppose that researchers add CRISPR-Cas9 to both strains in an attempt to prevent transformation. The experiment is then repeated by mixing heat-killed type IIIS bacteria with type IIR bacteria and injected into mice. Predict the lethality when one of the two mixed strains has added CRISPR-Cas9.
able[[Injection mixture, able[[type IIR and],[heat-killed],[CRISPR-Cas9],[type IIIS]], able[[heat-killed type],[IIIS and],[CRISPR-Cas9],[type IIR]]],[Outcome,,]]
Answer Bank
According to Griffith's 1928 experiments with Streptococcus pneumoniae and mice, some of the isolated strains of S. pneumoniae were lethal when injected into mice and some were not. An injection of type IIR bacteria was not lethal,but an injection of type IIIS was lethal. An injection of heat-killed type IIIS bacteria was no longer lethal., However, injecting a mix of both heat-killed type IIIS bacteria and live type IIR bacteria into mice was lethal. Blood analysis of the mice revealed live type IIIS bacteria. Ma
Suppose that researchers add CRISPR-Cas9 to both strains in an attempt to prevent transformation. The experiment is then repeated by mixing heat-killed type IIIS bacteria with type IIR bacteria and injected into mice. Predict the lethality when one of the two mixed strains has added CRISPR-Cas9.
type IIR and heat-killed type heat-killed IIIS and CRISPR-Cas9 CRISPR-Cas9 type IIIS type IIR
Injection mixture
Outcome
Answer Bank
