Classic experiments suggested that a floral stimulus, florigen, could move across a graft from an induced plant to a noninduced plant and trigger flowering
Recent evidence using Arabidopsis has recently shown that florigen is probably _____.
A) a phytochrome molecule that is activated by red light
B) a protein that is synthesized in leaves, travels to the shoot apical meristems, and initiates flowering
C) a membrane signal that travels through the symplast from leaves to buds
D) a second messenger that induces Ca++ ions to change membrane potential
E) a transcription factor that controls the activation of florigen-specific genes
Answer: B
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The results of the replica plating experiments by the Lederbergs supported which theory?
A. Random mutation theory B. Physical adaptation theory C. Both theories D. Neither theory
Enzymes that are regulated by molecules that bind somewhere other than the active site are called ______
Fill in the blank(s) with the appropriate word(s).
Replacing a patient's defective gene with a fragment containing a functional gene is
A. gene therapy. B. genomics. C. gene cloning. D. gene mapping. E. gene selection.
An organism found in coastal waters that causes a food infection and gastroenteritis due to a variety of contaminated raw and undercooked seafood is
A. Chlamydia trachomatis. B. Helicobacter pylori. C. Vibrio parahaemolyticus. D. Campylobacter jejuni. E. Vibrio cholerae.