Positive and negative transcriptional regulation differ in that:
A. positive regulation requires that a promoter
be present; it's not necessary in negative
regulation.
B. in positive regulation, the binding of a
regulatory protein to the DNA is necessary for
transcription to occur; in negative regulation,
no such protein is necessary.
C. in positive regulation, the binding of a
regulatory protein to the DNA is necessary for
transcription to occur; in negative regulation,
such binding prevents transcription.
D. in positive regulation, the absence of a
regulatory protein promotes transcription; in
negative regulation, the absence of a
regulatory protein promotes transcription.
E. None of these choices is correct.
C
You might also like to view...
Four of the five animals listed below are related
Select the exception. a. sea star b. sea anemone c. sea urchin d. brittle star e. sea cucumber
________ is a syndrome that occurs in females who have only a single X chromosome (XO)
Fill in the blank(s) with correct word
A bacteriophage that lacks its proteinaceous capsid structure is also called a viroid
Indicate whether the statement is true or false.
Examine the flux diagrams in Figure 25.6 to address the following questions. At what rate does fossil fuel combustion contribute carbon to the atmosphere?
What will be an ideal response?