An example of a mineral known as a micronutrient that may be toxic to plants is:
A. aluminum
B. cadmium
C. chromium
D. lead
E. all of the choices
E. all of the choices
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Which of the following is NOT true about
enzymatic regulatory molecules?
a. they allow an enzyme to catalyze many, diverse reactions. b. they may cause the enzyme to change its overall shape. c. they may enhance the activity of an enzyme. d. they may inhibit the activity of an enzyme. e. they may bind directly to an enzyme’s active site.
Which of the following is a function of pasteurization?
A. Reducing the total microbial population B. Increasing the shelf life of the product C. Killing pathogenic microorganisms D. All of the choices are correct.
If the frequency of hemophilia, an X-linked recessive disease, is 10% in males, what is the frequency of carriers in the population (both males and females)?
What will be an ideal response?
Which of the following statements correctly describes some aspect of protein secretion from prokaryotic cells?
A) Prokaryotes cannot secrete proteins because they lack an endomembrane system. B) The mechanism of protein secretion in prokaryotes is probably the same as that in eukaryotes. C) Proteins secreted by prokaryotes are synthesized on ribosomes bound to the cytoplasmic surface of the plasma membrane. D) Prokaryotes cannot secrete proteins because they lack ribosomes.