Provide a brief description of the variable gene activity hypothesis as it relates to development. What information is often provided in support of this hypothesis?
What will be an ideal response?
Since all cells apparently have the same genetic information, yet may differ structurally and functionally, the variable gene activity hypothesis suggests that differential gene transcription (genetic regulation) accounts for such cellular diversity.
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Which of the following is NOT synthesized from a DNA template?
A) messenger RNA B) amino acids C) tRNA D) ribosomal RNA
Arroworms seize their prey with:
a. tetrodotoxin. b. stinging cells. c. engulfing with their mouth. d. oral tentacles. e. grasping spines.
Which of the following uses labeled probes to visualize the expression of genes in whole tissues and organisms?
A) RT-PCR B) in situ hybridization C) DNA microarrays D) RNA interference
A knock-out mouse is made with respect to the PFKL gene, and this mouse is now described as which of the following?
A) a loss-of-function PFKL mouse B) a retention-of-function PFKL mouse C) a gain-of-function PFKL mouse D) an enhancement-of-function PFKL mouse