Figure 5-17 shows the approximate Km for the hydrolysis of ATP by helicase PcrA to be:
A. 3 µM.
B. 5 µM.
C. 10 µM.
D. 15 µM.
E. 20 µM.
A
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The model of island biogeography predicts that species richness will increase with decreasing distance from a species source pool. Which do you think would be considered the two most important source pools for a particular island? Select two options.
_____ A small, distant island. _____ A nearby island undergoing primary succession. _____ The closest mainland area. _____ A nearby, large island. _____ A distant, large island with similar habitats.
Four of the five answers listed below are related by a similar gland. Select the exception
a. goiter b. deficiency of iodine in the diet c. hypothyroidism d. rickets e. excessive stimulation of the thyroid gland
Water's density and, consequently, its buoyancy decrease at warmer temperatures. Considering the impact of temperature, and the table above, in which environment should diatoms sinking be slowest?
A) cold fresh water B) warm fresh water C) cold seawater D) warm seawater
A pharmaceutical company develops a drug inhibiting mitosis of sporozoites in an effort to prevent malaria. How would this affect the next step of the infection cycle of Plasmodium falciparum?
A. Merozoites would not be produced. B. Gametocytes would not be produced. C. Gametes would not be produced. D. Infected red blood cells would not attach to the linings of capillaries. E. Infected red blood cells would not burst.