The concentration of actin monomers at which the rate of polymerization into filaments equals the rate of depolymerization is called the _______ concentration.
a. equilibrium
b. critical
c. steady-state
d. treadmilling
e. dynamic
Ans: b. critical
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Which organism is used to initiate the fermentation of cabbage to make sauerkraut?
A. Propionibacterium B. Saccharomyces cerevisiae C. Streptococcus lactis D. Spirulina E. Leuconostoc mesenteroides
When Darwin covered the tip of a grass seedling with metal foil and then illuminated it from one side, what happened to the seedling?
A. It bent away from the directional light. B. It did not respond to the directional light. C. It grew toward the light, as expected. D. It waved back and forth. E. It wilted and died.
When two genes are located on different chromosomes, ____ of the offspring from a testcross for genetic linkage
should have a recombinant phenotype
a. over 75% b. about 50%
c. about 25% d. about 10% e. about 5%
Fruit that forms on an unpollinated plant in response to a hormone will lack
A) flavor. B) seeds. C) rind. D) naturally occurring hormones.