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 promoters for genes whose products are 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) Many ? factors regulate genes associated with embryonic development in eukaryotes.
E) UV irradiation can trigger the use of alternative ? factors.
Answer: D
You might also like to view...
The oxygen needed for respiration moves from the lungs and into capillaries by simple diffusion. Once in the capillaries, what molecule or other component of blood is responsible for transporting oxygen in the circulatory system?
A. There is no transport molecule; oxygen remains free in the blood. B. white blood cells C. hemoglobin D. cadherins
If a man expresses an X-linked recessive trait, his ____________________ was either homozygous or heterozygous for the trait
Fill in the blank(s) with correct word
Antimicrobial susceptibility testing should be performed when
a. a single bacterial species grows from any body site. b. an isolate has a predictable susceptibility profile to therapeutic drugs of choice. c. reliable standardized methods for testing a clinically significant isolate exist. d. administering intravenous or oral antibio-tics to treat an infection.
Phage-encoded proteins are
A. coded for by host DNA. B. coded for by phage DNA. C. proteins normally present in the uninfected cell. D. early proteins. E. coded for by phage DNA AND early proteins.