Which of the following parasites is the major parasitic cause of deaths worldwide, yet its transmission could be prevented by access to clean water?
A. Cryptosporidium parvum
B. Giardia intestinalis
C. Cyclospora cayetanensis
D. Entamoeba histolytica
Answer: D
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A molecule that closely resembles the shape of a substrate for an enzyme would most likely serve as a
A. noncompetitive inhibitor. B. allosteric inhibitor. C. competitive inhibitor. D. allosteric activator. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about enzymes and inhibition? What other information is related to the question? Choose Answer Do you have all the information needed to answer the question? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Approximately how many genes comprise the human exome?
A) 20 million B) 200,000 C) 2,000 D) 20,000
Which of the following most accurately
describes the cellular activity associated with the actual passage of a nerve impulse? a. electrical discharge b. action of sodium-potassium pump c. positive feedback d. hyperpolarization followed by rebalancing e. active transport of ions
Which of the following statements is TRUE?
a. Mosses have xylem and phloem. b. Mosses have true leaves. c. Mosses have true stems. d. Mosses have rhizoids, not roots, for attachment. e. Mosses have independent sporophytes.