Nurturing Life Sciences
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#Id: 6590
#Unit 7. System Physiology – Animal
#Id: 7309
#Unit 12. Applied Biology
The major form of Hg in the atmosphere is elemental mercury (Hg0 ), which is volatile and is oxidized to mercuric ion (Hg2+) photochemically. Most mercury thus enters aquatic environments as Hg2+.
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#Unit 3. Fundamental Processes
#Id: 3222
Transcribed genes are preferentially repaired when DNA damage occurs.
#Id: 2450
The lac operator overlaps the promoter, and so the repressor bound to the operator physically prevents RNA polymerase from binding to the promoter and thus initiating RNA synthesis.