A body of learned behavior that is socially transmitted among individuals and passed down from one generation to the next is known as ____
Fill in the blank with the appropriate word.
culture
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Members of the genus Lactobacillus
A. are strict aerobes. B. grow optimally under slightly alkaline conditions. C. produce large amounts of H2 as a byproduct of metabolism when growing on glucose. D. are normal flora of the human body in mouth, intestinal tract, and vagina.
Substance C is secreted from a neuron, and binds to its receptor on a nearby cell, triggering an increase in intracellular
cAMP. Substance C is therefore a ligand for a ____.
a. a receptor tyrosine kinase b. a G-protein-coupled receptor c. a hormone receptor d. a ligand-gated ion channel e. guanylyl cyclase
The connection between stem cells and cancer is that
A) all stem cells are also cancer cells. B) cells may become cancerous by expressing "stemness" genes. C) stem cells rescue cells that have become cancerous. D) both stem cells and cancer cells have inactivated telomerase.
The secondary structure of a protein forms ____
a. pleated sheets or coils b. when pleated sheet regions fold back on themselves c. from interactions between polypeptide chains d. from covalent bonding between amino acids e. a functional chromatin uni