If you isolate the secretory protein from secretory vesicles and inject it into the cytosol, it will
a. be taken up into the rough ER and follow the secretory pathway.
b. be taken up into secretory vesicles and secreted.
c. be secreted through channels in the plasma membrane.
d. remain in the cytosol until it is degraded.
Ans: d. remain in the cytosol until it is degraded.
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You just discovered a new virus. This virus infects heart muscle, where it causes inflammation. This virus has a very high mutation rate. Which of the following is the best strategy for finding a treatment for this virus?
A) Develop a vaccine from living viruses. B) Identify the receptor this virus uses and develop an enzyme that blocks the receptor. C) Encourage infected individuals to engage in heart-strengthening exercise. D) Develop a drug that blocks the host's ribosomes, which the virus uses to produce its proteins.
What does the phrase “antagonistic muscles” mean?
What will be an ideal response?
All of the following are used as bioluminescent tools for cell biologists except
A) luciferase. B) rhodopsin. C) GFP. D) YFP. E) none of the above
Transcription of structural genes in an inducible operon _____
A) occurs continuously in the cell B) starts when the pathway's substrate is present C) starts when the pathway's product is present D) stops when the pathway's product is present