What is the role of monoamine oxidase and acetylcholinesterase in the nervous system?
a. To produce neurotransmitter molecules.
b. To serve as receptors for neurotransmitter molecules.
c. To breakdown neurotransmitter molecules.
Ans: c. To breakdown neurotransmitter molecules.
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You have a small population of beetles. One day a large rainstorm causes flooding and wipes out 87% of the population. The remaining individuals have much lower genetic variation than the original population
Which of the following would explain the lack of H-W equilibrium seen after the flood? A. founder effect B. random mating C. small population size D. genetic drift E. migration
A population that is decreasing in size will have an age-structure histogram shaped like a(n):
A. pyramid, with a wide base at the bottom representing a large number of young individuals. B. rectangle, with an (roughly) equal number of individuals in each age group. C. inverted pyramid, with a narrow base representing a small number of young individuals. D. diamond, with a wide center depicting a large number of individuals that have reached reproductive maturity.
What type of bond is formed by dehydration synthesis between two amino acids?
A. Phosphate B. Disulfide C. Ester D. Glycosidic E. Peptide
Fragile sites are chromosome locations that
A. show an increased number of chromosome bands. B. show a decreased number of chromosome bands. C. are all associated with a specific defective phenotype. D. indicate that carriers are mentally retarded. E. are inherited in a codominant fashion.