The promotion of the lac operon in bacteria is ________________________.
A. activated by a repressor protein
B. dependent on lactose concentration
C. dependent on glucose concentration
D. regulated by RNA polymerase
E. regulated by mRNA
Answer: B
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The last case of naturally contracted smallpox occurred in
A. 1900. B. 1950. C. 1965. D. 1977. E. 1989.
The retroviruses, including HIV, are unique because they use
A) replication. B) reverse transcription. C) splicing. D) reverse translation. E) posttranslational modification.
Saccharomyces cerevisiae, which is used to make bread rise and to ferment grains, is a(n):
1.Ascomycete
2.Basidiomycete
3.Chytrid
4.Zygomycete
Bacteriophage T4 blocks transcription of host genes using an enzyme that transfers an ________ from NAD onto the alpha subunit of RNA polymerase.
What will be an ideal response?