An action potential is brought about by
a. a sudden membrane impermeability.
b. the movement of negatively charged proteins through the neuronal membrane.
c. the movement of lipoproteins to the outer membrane.
d. a local change in membrane permeability caused by a greater-than-threshold stimulus.
e. the movement of negatively charged amino acids through the neuronal membrane
D
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During which cellular process do all three forms of RNA associate?
A. ribosome assembly B. chromatin formation C. formation of the nucleolus D. protein synthesis
The ____ lineage was a diverse group in the Mesozoic, but now is composed of only two living members, including
the tuatara.
a. Testudines b. Archosauria c. Squamata d. Sphenodontida e. Amphibia
What benefit will plants gain from the fungal hyphae when they are involved in a mycorrhiza relationship?
a. Dispersal of the plant seeds b. Structural support c. Increased reproductive capabilities d. Protection e. Increased surface area for absorption of water and nutrients
One finding of the HGP was that mutations in ____________ can cause mutations in distant regions
of the genome, which can result in cancer. A. DNA repair genes D. single nucleotide polymorphisms B. promoter regions E. DNA polymerase genes C. introns