Describe the path a protein destined for secretion takes from synthesis to when it leaves the cell.
What will be an ideal response?
Answers should include that proteins are made on ribosomes on endoplasmic reticulum (RER) and then passed to the Golgi complex via transport vesicles that bud off from the ER. Within the Golgi complex, proteins may be modified with sugars or other molecules. Vesicles pinch off the Golgi complex and carry the molecules to the plasma membrane where they are released to the outside by exocytosis.
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The products of tumor suppressor genes stimulate cell proliferation, while the products of proto-oncogenes inhibit cell proliferation
Indicate whether the statement is true or false
Histoplasmosis may be diagnosed by observation of (spherules/spiny spores/pseudohyphae) in samples from the lungs.
Fill in the blank(s) with the appropriate word(s).
Males of many marsupial species have forked penises that are incompatible with the anatomy of female placental mammals. What type of isolating mechanism does this represent?
A. temporal isolation B. mechanical incompatibility C. ecological isolation D. hybrid sterility E. prevention of gamete fusion
The figure above depicts the change in p over time when the forward mutation rate is twice the reverse muta-tion rate
This results in a p equilibrium frequency that approaches 0.333. If the forward mutation rate was four times as fast as the reverse mutation rate, one would expect the equilibrium value of p to be: a. stable b. unstable c. lower than 0.33 d. higher than 0.33 e. A and C