Initiation of transcription by RNA polymerase involves the binding of which of the following subunits to the core enzyme?

A) delta
B) sigma
C) gamma
D) alpha
E) zeta


B) sigma

Biology & Microbiology

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An organism is described that can live in very high temperature water. What group would contain this organism?

A) Bacteria domain B) Archaea domain C) Protista kingdom D) Animalia kingdom

Biology & Microbiology

Which statement is not true of endotoxins?

A) They can lyse amoebocytes found in crab hemolymph. B) Endotoxins are produced by Neisseria meningitidis and E. coli. C) They are easily eliminated from the body as a result of antitoxin production. D) They can induce chills, fever, aches, clotting, shock, and miscarriage. E) They are more heat-resistant than exotoxins are.

Biology & Microbiology

All of these statements about Chlamydomonas are true EXCEPT ________.

A. Chlamydomonas only reproduces asexually B. each motile Chlamydomonas cell has a single haploid nucleus C. Chlamydomonas has two flagella D. Chlamydomonas is photoautotrophic

Biology & Microbiology

What would happen if, during meiosis, the chromosome number was not halved before egg and sperm formation?

A) each offspring would have different phenotypes than their parents B) the spindle would be compromised C) n would become halved D) in each successive generation, the offspring would double their chromosome number E) nothing

Biology & Microbiology