Scientists Have Demonstrated That the Cholera Bacteria,Vibrio Cholerae,can Exist as a Rather

question 3

Multiple Choice

Scientists have demonstrated that the cholera bacteria,Vibrio cholerae,can exist as a rather harmless form or,by phage conversion,can exist as a disease-causing,virulent form.This conversion is caused by

• A)the phage entering the cholera bacterium genome and causing the bacterium's cell to lyse.
• B)the phage introducing a gene into the bacterium's chromosome that codes for the cholera toxin that can cause death in humans.
• C)the phage altering the cell wall of the cholera bacterium that produces a toxin that can cause death in humans.
• D)the phage alters the host cell,which permits direct entry of the cholera bacterium into the host cell leading to death in humans.

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