Which of the following is incorrect regarding facilitated diffusion?
a. It is a passive process.
b. It allows the movement of molecules from areas of low concentration to areas of high concentration.
c. It may use either channel or carrier proteins.
d. It allows the rapid transport of glucose across the membrane.
b. It allows the movement of molecules from areas of low concentration to areas of high concentration.
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The molecule that functions as a corepressor for the trp operon is
A. glucose. B. cAMP. C. tryptophan. D. CAP. E. lactose.
The RNA molecule involved in both transcription and translation is _____________. Fill in the blank(s) with the appropriate word(s)
Most conifers have only tracheids. Which structural feature allows water and minerals to pass from one tracheid to the next?
A) Stomata B) Pits C) Secondary cell walls D) Plasmodesmata E) Sieve plates
In his 1961 paper "The Paradox of the Plankton," ecologist G. E. Hutchinson noted that several species of algae coexist, sharing the same few mineral nutrient resources in homogeneous open-water systems
Because there is little chance of resource partitioning and niche differentiation in such a situation, the paradox of their coexistence is an apparent violation of A) Darwin's theory of evolution by means of natural selection. B) the law of mass action. C) the second law of thermodynamics. D) the climax theory of succession. E) the competitive exclusion principle.