Untranslated regions of the mRNA transcript may interact with motor proteins to enhance transport of the mRNA to a distinct region of the cell; or these regions may interact with proteins that repress the translation of the mRNA
A. true
B. false
A
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The central dogma of molecular biology states that information flows from:
A. DNA directly to proteins. B. protein to RNA to DNA. C. DNA to RNA to protein. D. RNA to protein to DNA. E. RNA to DNA to protein.
The highest number of individuals in the
United States are in the ___ age structure category.
a. pre-reproductive b. early reproductive c. late reproductive d. early post-reproductive e. late post-reproductive
What is a cost to the female in a polygynous mating system?
A. little opportunity to mate with a genetically fit male B. high risk of contracting sexually transmitted diseases C. little help from male in caring for offspring D. high competition between females for access to males
A calmodulin-regulated kinase (CaM-kinase) is involved in spatial learning and memory. This kinase is able to phosphorylate itself such that its kinase activity is now independent of the intracellular concentration of Ca2+
Thus, the kinase stays active after Ca2+ levels have dropped. Mice completely lacking this CaM-kinase have severe spatial learning defects but are otherwise normal. A. Each of the following mutations also leads to similar learning defects. For each case explain why. (1) a mutation that prevents the kinase from binding ATP (2) a mutation that deletes the calmodulin-binding part of the kinase (3) a mutation that destroys the site of autophosphorylation B. What would be the effect on the activity of CaM-kinase if there were a mutation that reduced its interaction with the protein phosphatase responsible for inactivating the kinase?