Biology, 27.10.2020 05:20 trevorhenyan51
How do scientists know that most galaxies are moving away from us? what is this evidence for?
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Biology, 22.06.2019 02:50
Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?
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Biology, 22.06.2019 03:50
The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above
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Biology, 22.06.2019 06:50
Which organelle breaks down sugar molecules that supply energy to the cell ?
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How do scientists know that most galaxies are moving away from us? what is this evidence for?...
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