________ triggers the formation of weak-celled abscission layers in leaves and fruits, allowing them to drop off at appropriate times during the year
A) Gibberellin B) Cytokinin C) Auxin D) Abscisic acid E) Ethylene
E
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Which one of the following biological polymers is mismatched with its monomer?
A) DNA - nucleotide B) enzyme - amino acid C) chitin - monosaccharide D) protein - amino acid E) cellulose - amino acid
Under which of the following circumstances would a DNA microarray be useful?
A. It would enable a researcher to determine the differences in gene expression between cell types. B. It would enable doctors to determine which genes are responsible for producing diseased tissue in an individual. C. Researchers are trying to determine if an individual has inherited a genetic disease from their parents. D. All of these are circumstances in which a DNA microarray would be useful. E. None of these are circumstances in which a DNA microarray would be useful.
Which of the following is the correct order of plant evolutionary appearance (geologically oldest to present date)?
A) angiosperms, gymnosperms, psilopsids, pteriodophytes B) gymnosperms, angiosperms, psilopsids, pteriodophytes C) psilopsids, pteriodophytes, gymnosperms, angiosperms D) pteriodophytes, gymnosperms, angiosperms, psilopsids
Which mechanism of controlling gene expression occurs outside of the nucleus?
A) adding a cap and tail to RNA B) DNA packing/unpacking C) RNA splicing D) translation