Within the control region of the trp operon is a section of DNA that is sensitive to levels of tryptophan in the system. What is the name of this region?
What will be an ideal response?
leader or attenuator region
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In Chapter 2, you learned about beneficial bacteria that live on our skin and lower the pH,
which in turn keeps other disease-causing bacteria in check. This relationship between beneficial bacteria and their human hosts is an example of __________.
a. coevolution b. adaptive radiation c. sexual selection d. mutation
Bacteria protect restriction sites in their own DNA from being cut by restriction enzymes by ____
a. synthesizing low quantities of restriction enzymes b. producing restriction enzymes that do not recognize sequences in their own DNA c. chemically modifying bases within the restriction sites d. only activating restriction enzymes when foreign DNA is present in the cell e. inactivating restriction enzymes through phosphorylation
Speciation is more likely to occur if the isolated population is large
_______ Indicate whether the statement is true or false.
According to Thomas S. Kuhn and his book, 'The structure of scientific revolutions', paradigms change quickly as scientists rush to embrace new scientific ideas and new evidence
Indicate whether the statement is true or false.