What three documented mechanisms do cells use to localize mRNAs?
What will be an ideal response?
Ans: 1) The mRNA may be uniformly distributed in the cell but degraded at all but specific locations. 2) The mRNA is able to freely diffuse but becomes trapped at specific locations. 3) The mRNA is actively transported to specific locations.
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The scientists responsible for the idea that RNA can act as a catalyst were
A. Watson and Crick. B. Beadle and Tatum. C. Altman and Cech. D. Lederberg and Stanley.
Familial hypercholesterolemia affects approximately what paercentage of individuals?
a. 1/500 b. 1/5 c. 1/50 d. 1/1,000 e. 2/100
Hair color (or lack of it) is mostly due to:
A) sweat gland pigments. B) sebaceous gland pigments. C) activity of melanocytes. D) a colored version of keratin.
In the pine life cycle
A. the cone is the fruit that surrounds the seeds. B. fertilization occurs shortly after pollination to produce the zygote. C. the gametophyte generation is dominant and the sporophyte generation is inconspicuous. D. seed cones are located near the tips of higher branches and pollen cones develop near the tips of lower branches. E. seed cones are smaller than pollen cones.