When does a cell regulate gene expression?
A. Pretranscription through pretranslation
B. Pretranscription through posttranslation
C. Posttranscription through posttranslation
D. Posttranscription through pretranslation
Answer: B
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The production of random evolutionary changes in small breeding populations is
1.gene flow. 2.genetic drift. 3.founder effect. 4.mutations. 5.migration.
Which event is likely to add the most carbon dioxide to the atmosphere?
a) development of a hurricane in the Gulf of Mexico b) leakage from a nuclear reactor in Japan c) clear-cutting of trees in the Brazilian rain forest d) eruption of a volcano in Iceland
The greatest amount of kinetic energy is found in
A. gases. B. liquids. C. solids. D. colloids.
Select the best response to the question. ? ?Why is it difficult to treat HIV infection?
A) The disease is difficult to diagnose. B) The virus infects the cells of the immune system. C) The disease produces very severe symptoms and is fatal. D)There is only one drug that can be prescribed.