In negative control, what molecule would you expect to find bound to the operator if there is no transcription?
A) activator
B) repressor
C) inducer
D) corepressor
E) RNA polymerase
B
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Where would you expect to find the receptor for a nonpolar ligand?
A. on the cell surface B. in the nucleus of the cell C. in the cytosol D. either in the nucleus of the cell or in the cytosol
. As of 2011, how many species were listed in the IUCN’s Red List of endangered species?
a. 610,000 b. 6100 c. 61,000 d. 6,100,000
You have isolated the gene for a protein, nuculin (a protein that some people believe resides in the nuculus) that is normally localized to the nucleus. You locate in the gene the portion of the coding sequence that codes for the nuclear localization signal (NLS) and engineer it so that a positively charged amino acid in the signal is replaced by a nonpolar amino acid) You then insert the gene into some cells and observe where nuculin goes after its synthesis. What is the effect, if any?
a) Nuculin is not moved to the nucleus. b) Nuculin is not made by the cell at all. c) There is no effect. d) Nuculin moves to the nucleus as it usually does.
Answer the following questions true (T) or false (F)
1. Lakes and rivers account for slightly more available freshwater than groundwater does. 2. Human industry is responsible for more nitrogen fixation worldwide than soil bacteria. 3. An animal that exclusively eats grasses would be both a primary consumer and an herbivore.