Which best describes the role of neurotransmitters in behavior?
A. In specific ecological contexts, neurotransmitters can be important for behavior. For instance, aggression requires the neurotransmitter serotonin.
B. Some specific behaviors will require neurotransmitters. For instance, aggression requires the neurotransmitter serotonin.
C. Neurotransmitters allow neurons to communicate, and are thus involved in all behaviors. Levels of specific neurotransmitters have been associated with levels of specific behaviors -- such as serotonin and aggression.
D. Neurotransmitters have been developed for researchers who want to manipulate animal behaviors. For instance, serotonin can be applied to lobsters to increase aggression.
C. Neurotransmitters allow neurons to communicate, and are thus involved in all behaviors. Levels of specific neurotransmitters have been associated with levels of specific behaviors -- such as serotonin and aggression.
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Which of the statements about the synthesis of polypeptides (proteins) is INCORRECT?
A. Translation is the process of protein synthesis. B. Proteins are synthesized in the cytosol. C. The synthesis of proteins is a catabolic process. D. The synthesis of proteins requires ribosomes. E. Proteins are synthesized from mRNA template.
The recognition site for a restriction enzyme is 5? ACCGG^T 3?. The ^ symbol indicates the site of cleavage. After digestion of DNA with this restriction enzyme, how will the ends of the resulting DNA fragments look?
A) They will have sticky, single-stranded ends with 5? overhangs. B) They will have sticky, single-stranded ends with 3? overhangs. C) They will have blunt ends. D) They will have sticky, double-stranded ends. E) The result cannot be predicted using only the information given.
A(n) ____________________ is a tally of the number of cells in a microliter of blood. Fill in the blank(s) with the appropriate word(s)
The viridans streptococci are:
A. not entirely groupable by Lancefield serology. B. the most numerous residents of the oral cavity. C. opportunists that can cause subacute endocarditis. D. introduced to deeper body tissues by dental or surgical procedures. E. All of the choices are correct.