By restricting the traffic of proteins and RNA across the nuclear envelope, eukaryotic cells can regulate
a. translation.
b. transcription.
c. endocytosis.
d. nuclear pH.
Answer: a. translation.
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To test for the presence of starch, iodine can be used. A positive reaction results in a black color. A dialysis bag filled with starch solution and secured on both ends is placed in iodine solution. After 30 minutes the dialysis bag appears black. Based on this information, what most accurately describes what happened?
A. Due to its size and polarity, starch was able to exit the dialysis bag and interact with the iodine solution. B. Due to its size and polarity, iodine was able to enter the dialysis bag and interact with starch. C. Over time, both iodine and starch are equally distributed throughout the two solutions.
Bioluminescence is:
A. emission of flashes of light by organisms B. capture of moonlight for nocturnal photosynthesis C. light absorbed by other pigments and transferred to chlorophyll a D. the fluorescing of Gram-positive bacteria E. none of the other choices provided
Which proteins play a central role in the fusion of a vesicle with a target membrane?
A.) clathrin B.) Rab proteins C.) tethering proteins D.) adaptin E.) SNAREs
Mitotic cells do not divide regularly but can be stimulated to divide when necessary.
a. true b. false