Sigma (?) factors can regulate the initiation of transcription. Which of the following is not an example of ? regulation?
A) Some ? factors recognize promoters for genes whose products are necessary when the organism is under stress, such as heat shock.
B) Some ? factors recognize genes necessary for nitrogen utilization.
C) Bacteriophages may code for specific ? factors that bind the core RNA polymerase and result in recognition of viral promoters.
D) There are many ? sigma factors associated with eukaryotic organisms.
D) There are many ? sigma factors associated with eukaryotic organisms.
You might also like to view...
________ mutations affect only a single base pair in a gene.
Fill in the blank(s) with the appropriate word(s).
The relationship of disease-causing organisms to an infected rabbit is one of
A. parasitism. B. commensalism. C. competition. D. herbivory. E. interference competition.
Cholesterol
A) is found in abundance in prokaryotic cell membranes. B) intercalates between the fatty acid chains within the bilayer. C) increases permeability for small cations. D) destabilizes the cell membrane. E) is found only in plants.
The mitochondrial cristae are an adaptation that
A) helps mitochondria divide during times of greatest cellular respiration. B) increases the space for more copies of the electron transport chain and ATP synthase complexes. C) allows other ions (like Na+) to build up when H+ ions are not available. D) carefully encloses the DNA housed within the mitochondrial matrix. E) permits the expansion of mitochondria as oxygen accumulates in the mitochondrial matrix