____ and ____ help hold cells together
Fill in the blank(s) with the appropriate word(s).
adhesion junctions
tight junctions
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In the mechanism of stomatal opening, after light activates proton pumps which of the following
happens next? a. Guard cells change shape. b. Hydrogen ions are actively transported out of guard cells. c. Potassium ions diffuse into guard cells. d. Chloride ions diffuse out of guard cells. e. Water moves by osmosis into guard cells.
You lead a research team challenged with the task of creating a regulatory protein able to shut off transcription of a particular gene. You focus your design around a binding site called an operator that is associated with the promotor. The physical location of the operator most likely to affect transcription would be
A. downstream of the gene promoter. B. internal to the gene itself. C. upstream of the gene promoter. D. internal to the gene promoter.
In a dihybrid cross that shows complete linkage, which of the following would you expect from a test cross between a cis configuration wild type heterozygote for both genes and a double mutant?
a) Only the wild type phenotypes b) Only the mutant phenotypes c) 1/2 of the offspring will have both of the wild type phenotypes and 1/2 will have both of the mutant phenotypes. d) 9:3:3:1 ratio of phenotypes
In multicellular species, fungal spores germinate and give rise to filaments called __________.
Fill in the blank(s) with the appropriate word(s).