Describe how the lac genes of E. coli can be induced
What will be an ideal response?
Ans: When allolactose is present, it acts as an inducer by binding to the repressor, which causes the repressor to dissociate from the operator. This allows RNA polymerase to bind to the lac promoter and transcribe the genes.
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RIFAs are a(n) ____ species
a. host b. parasitic c. pioneer d. keystone e. exotic
Which of the following is not considered part of the process of morphogenesis per se?
a. Cells become specialized. b. Cells migrate into specific areas. c. Certain cells undergo changes in shape. d. Cells become organized into intricate patterns of tissues and organs. e. Some cells undergo apoptosis
Some species of Streptococcus, when grown on blood agar, produce an incomplete hemolysis with the formation of a greenish zone around the colony; this is referred to as ________.
A. beta-hemolysis B. gamma-hemolysis C. alpha-hemolysis D. None of the choices are correct.
The dengue viruses are spread by (fleas/mosquitoes/ticks)
What will be an ideal response?