Chronic low-level ingestion of ________ may cause liver cancer

A) aflatoxin
B) aspergillin
C) ergotamine
D) phalloidin
E) psilocybin


A

Biology & Microbiology

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Histone deacetylase inhibitors are a class of drugs used as mood stabilizers and anti-epileptics that are also being researched for their efficacy as anti-cancer agents. Histone deacetylase inhibitors block the action of histone deacetylases, which remove acetyl groups from lysine residues in histone tails. How will blocking histone deacetylases affect gene expression in the cell?

A. Chromatin will become more tightly compact, and gene expression will be reduced. B. Chromatin will become more tightly compact, and gene expression will be increased. C. Chromatin will become more open, and gene expression will be reduced. D. Chromatin will become more open, and gene expression will be increased. E. Chromatin will become more methylated, and gene expression will be decreased.

Biology & Microbiology

What percent of the total blood volume is plasma?

a. 25 b. 40 c. 55 d. 65 e. about 80

Biology & Microbiology

You have been assigned to address a problem of overpopulation of species X in a nearby county. One of the members of your team suggests introducing species Y, which is a natural predator of species X, but not normally found in the area. After some discussion, you go ahead and introduce species Y. What aspects of the hierarchical organization may be affected within a period of a several years?

A. organism, population, species B. population, species, community, biosphere C. population, species, community D. population, community

Biology & Microbiology

The gene responsible for the condition known as sickle-cell anemia demonstrates ________.

A) incomplete dominance B) a dominant genetic disorder C) a sex-linked genetic disorder D) a recessive genetic disorder

Biology & Microbiology