Substances that release ions when dissolved in water and conduct electricity are ________.
A. electrons
B. solvents
C. nonpolar
D. electrolytes
E. covalent
Answer: D
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Which of the following protein tags allows for affinity chromatography using Ni2+ as the ligand?
A. glutathione-S-transferase (GST) B. His tag C. maltose-binding protein D. ?-galactosidase E. protein A
When ATP is made during glycolysis and the Krebs cycle, it is by ________.
A. oxidative phosphorylation B. chemiosmosis C. substrate-level phosphorylation D. ATPase E. photophosphorylation
A population of Escherichia coli doubles about every ____________ in a laboratory culture.
a. 2 hours b. 20 minutes c. 2 minutes
What is opsonization?
A) Opsonization is the clumping of pathogens to increase the efficiency of phagocytosis. B) Opsonization leads to neutralization of toxins produced by pathogens. C) Opsonization, which is the coating of bacteria with antibodies, allows for more effective phagocytosis of bacteria. D) Opsonization is the coating of helminthes with antibodies, which signal the eosinophils to produce lytic enzymes.