Gene expression profiles differ from classic gene maps in that
A) gene expression profiles depict the relative locations of genes on chromosomes, and classic gene maps show the increase and decrease of transcription with time or in different tissues.
B) gene expression profiles depict the increase and decrease of transcription with time or in different tissues, and classic gene maps show the relative locations of genes on chromosomes.
C) gene expression profiles measure DNA, and classic gene maps size-order the chromosomes.
D) gene expression profiles sequence genomes, whereas classic gene maps do not actually sequence the DNA.
B) gene expression profiles depict the increase and decrease of transcription with time or in different tissues, and classic gene maps show the relative locations of genes on chromosomes.
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It has been observed that when the sugar source changes in a growth medium, the growth rate of yeast vary widely in response. Some strains of yeast are slow to induce catabolic operons while other strains quickly synthesize proteins to process the new sugar. What might be one explanation for this difference in the growth rate of the strains?
A. Operons for anabolic pathways are controlled by many global regulatory mechanisms, and different sugars can favor initiation of different pathways depending on the strain of yeast. B. Different sugars can act as effector or repressor molecules in various strains, promoting or inhibiting transcription of genes depending on the type of sugar present. C. Catabolic repression strategies of operons for using different sugars may vary among strains, thereby favoring initiation of transcription in one strain over another depending on the sugar. D. All of the choices are correct.
The portal of entry for the largest number of pathogens is the _____
Fill in the blank(s) with the appropriate word(s).
Heidi injured a ventral root below her ribs. What problem will she likely experience?
A) She will have trouble walking. B) She will become deaf. C) She will lose all sense of touch in her abdomen. D) She will not be able to close her eyes.
Which of the following is a taxon that contains all the other taxa listed?
A. kingdom B. family C. genus D. phylum E. species