The major difference in gene regulation between prokaryotes and eukaryotes is that...
A. eukaryotic and prokaryotic genes are usually grouped for common functions.
B. eukaryotic genes regulation requires fewer signals that prokaryotic gene regulation.
C. eukaryotic gene regulation is more simplistic than prokaryotic gene regulation.
D. eukaryotic genes are arranged individually, while prokaryotic genes are grouped into operons.
E. eukaryotic gene regulation tends to require less coordination and integration than prokaryotic gene regulation.
D. eukaryotic genes are arranged individually, while prokaryotic genes are grouped into operons.
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The bitter receptor hTAS2R38 is activated by glucosinolates found in plants such as turnips and broccoli. Glucosinolates can block synthesis and transport of iodine. Before the advent of iodized salt, this was a particular problem in areas of the world that are naturally low in iodine. Why might the human population include different variants of the hTAS2R38 gene?
A. Areas of high iodine are generally coastal, and turnips and broccoli are not easily grown there. B. Iodine created mutations in the hTAS2R38 gene. C. Where iodine was low, eating plants rich in glucosinolates helped people metabolize iodine, but where iodine was high they avoided such foods. D. Where iodine was low, it was important to avoid foods with glucosinolates, but where iodine was plentiful, palatability of a wider range of plants was beneficial. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about taste receptors? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What ion is mainly responsible for seawater being slightly alkaline?
a. Carboxylic acid b. Carbon dioxide c. Bicarbonate d. Nitrogen
The effect of resource availability on population size ultimately determines ____
a. the carrying capacity of the environment b. exponential growth c. the doubling time of a population d. the population's biotic potential e. the loss of species in an ecosystem
The model of species selection is analogous to natural selection. In this analogy, ________ are like individuals within a population, and ________ is analogous to reproduction
A) major groups of organisms; extinction B) species; speciation C) genes; gene duplication D) families; interbreeding