The tryptophan operator ___________________________
(a) is an allosteric protein.
(b) binds to the tryptophan repressor when the repressor is bound to tryptophan.
(c) is required for production of the mRNA encoded by the tryptophan operon.
(d) is important for the production of the tryptophan repressor.
(b)
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The main benefit to a plant from a mycorrhizal association is ____
a. enhanced water uptake b. removal of excess carbohydrates c. enhanced flow of carbohydrates to the roots d. enhanced mineral ion uptake e. enhanced protection of roots from bacterial infections
Where does precursor-mRNA (pre-mRNA) typically exist?
a. in both prokaryotes and eukaryotes b. only in prokaryotes c. only in the nucleus of eukaryotes d. only in the cytoplasm of eukaryotes
Choose the letter of the best match from the following:A. abscisic acidB. trichomesC. aquaporinD. endodermisE. stomaPore in plasma membrane that allows water movement.
Fill in the blank(s) with the appropriate word(s).
The complete set of information found in a given organism's DNA is called its ____________
(a) genetic code. (b) coding sequence. (c) gene. (d) genome.