What factors are utilized by the cell in order to recognize the stop codon and disassemble the translation machinery?
A. release factors
B. transcription factors
C. mRNA factors
D. initiation factors
E. elongation factors
Answer: A
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Up until 20-30 years ago, people with cystic fibrosis (CF) wouldn't live long enough to reproduce
CF is a homozygous recessive condition, leading researchers to think that over time the incidence of CF would decrease because the allele would be removed from the gene pool. The results actually indicate that the rate of CF is on the rise. Which of the following would explain those results? A. We are being subjected to more mutations as a population due to more pollution. B. The population is increasing, and more people mean more mutations. C. The heterozygous condition is being selected for, much like what we see with sickle cell trait. D. People are traveling more, so when members from different areas reproduce, more mutations will result.
All of the following statements about cellular trafficking are true except
A) COPII-coated vesicles move materials from ER to Golgi. B) COPI-coated vesicles move materials from Golgi to the secretory vesicle. C) movement may be mediated by microtubules. D) v-SNAREs occur in vesicles; t-SNAREs occur on target sites. E) tethering proteins mediate docking between target and vesicle.
One way to examine the assembly and organization of the actin cytoskeleton in animals is to examine
____.
a. animal cells in culture b. extracellular actin movement in bacterial pathogens c. intracellular actin movement in bacterial pathogens d. extracellular actin movement in viral pathogens e. intracellular actin movement in viral pathogens
A __________ is an area where all precipitation
drains into a specific waterway. Fill in the blank(s) with the appropriate word(s).