What was needed by the microorganisms to facilitate the speed of the bioremediation process after the Exxon Valdez oil spill?
A. More phosphate
B. More bacteria
C. More oil
D. All of these choices are correct.
Answer: A
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Nicotine from cigarette smoke acts as a ligand and associates with specific proteins on the surface cells in the brain, causing feelings of pleasure and well-being. Below are the events that happen in the cellular response to nicotine
Place the events in the correct order to describe the five basic steps in the pathway of a signal transduction system. A. receptor binding B. receptor activation C. signal transduction D. response E. termination The opening of an ion channel as a result of nicotine association is an example of _________________. ________________ occurs when an influx of ions causes an action potential, which carries the signal to the reward areas of the brain. Nicotine interaction with the transmembrane protein that normally binds the neurotransmitter acetylcholine is an example of _________________. ________________ occurs when the signal causes release of dopamine in the brain, which causes relaxation and feelings of well-being. Rapid elimination of nicotine from the body is an example of ____________. What will be an ideal response?
Which of the following is not true of the regulation of translation initiation in eukaryotes?
A. Repressors bind to the 3' untranslated region of mRNA. B. Repressors bind to initiation factors. C. Repressors bind to translational start sites of mRNA. D. Repressors bind to translational release factors.
A cell that makes up the body structure of an organism and is diploid is _______
A. a gamete B. a somatic cell C. an allele D. rare E. a sperm cell
According to the animation, where on the DNA strand does a repressor bind?
a. The inducer b. The operator c. The promoter d. The structural genes