How does methyl mercury affect living things?
A. It inhibits the electron transport chain during cellular respiration.
B. It inhibits transcription.
C. It precipitates proteins.
D. It interferes with translation of mRNA.
E. It interferes with DNA replication.
Answer: C
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What special adaptation(s) has/have Thermoplasma evolved to survive in hot acidic environments?
A) Thermoplasma stabilize their cytoplasmic membrane by incorporation of tetraether lipoglycans in the cytoplasmic membrane. B) Thermoplasma have a reinforced cell wall containing basic amino linkers in the peptidoglycan. C) Thermoplasma excrete hydrogen ions and import hydroxyl ions. D) Thermoplasma are highly motile to avoid destruction.
A binomial is always a
a. genus. b. specific epithet. c. scientific name. d. two-part name.
The semilunar valves prevent blood from moving:a
from the atria back into the veins. b. from the ventricles back into the atria. c. from the arteries back into the ventricles. d. moving backwards in the capillaries. e. moving backward in the arteries.
Cell signaling can be classified into
a. three distinct types based on the distance over which the signaling molecules act b. two distinct types based on the distance over which the signaling molecules act c. three distinct types based on the signaling molecules d. none of the above