Suppose a phage infected a protease-deficient bacterial cell. Would the lytic or lysogenic life cycle be favored? Why?
What will be an ideal response?
The lytic cycle. Protease action is responsible for degradation of the cII protein under conditions of active bacterial growth. The absence of cII prevents the formation of the cII/cIII complex and the subsequent transcription of the cI gene, which encoded the repressor protein. Without the repressor, transcription of the lytic genes is not suppressed and the lytic cycle ensues.
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The mycelium of a multicelled fungus is a mesh of filaments, each called a _____
Fill in the blank(s) with correct word
Which of the following groups represents the MOST closely related organisms?
a. kingdoms b. species c. orders d. genera e. taxa
Rocky Mountain spotted fever
A. is seen in highest numbers along the west coast. B. has symptoms that include fever, headache, and rash. C. is transmitted by Ixodes ticks. D. never has severe complications. E. All of the choices are correct.
The membrane attack complex is a part of the _______ system.
A. mononuclear phagocyte B. complement C. adaptive defense D. interferon