Which of the following tests will not differentiate between species of staphylococci?
A) Beta hemolysis
B) Mannitol fermentation
C) Coagulation of plasma
D) Gram stain
E) Reaction to novobiocin
D) Gram stain
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The blood vessels surrounding the loop of Henle are collectively called the ____ and are arranged in a countercurrent organization, just like the loop of Henle itself
Fill in the blank with the appropriate word.
What is the purpose of a selectable marker such as the antibiotic-resistance gene ampR?
A. Selectable markers allow a researcher to identify cells that have incorporated the recombinant plasmid. B. Selectable markers produce antibiotics, which kill cells that have not incorporated recombinant plasmid. C. Selectable markers prevent cells that have incorporated one plasmid from incorporating another. D. Selectable markers allow a researcher to identify the recombinant plasmid. E. Selectable markers are only effective in viral vectors.
The color changes associated with a healing bruise can be attributed to the breakdown of heme groups to ________
Fill in the blank(s) with correct word
Which of the following factors may influence an enzyme's activity by altering its three-dimensional structure?
A) pH, temperature, and competitive inhibitor B) pH C) pH and temperature only D) temperature E) competitive inhibitor