What cells are phagocytes that can also present antigens to TH cells?
A. B cells
B. macrophages
C. plasma cells
D. T cells
E. monocytes
B. macrophages
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What is considered the most critical function of erythrocytes?
A. the transport of oxygen B. the transport of carbon dioxide C. buffering against changes in blood pH D. assisting in clot formation E. All of the answers are considered the most critical functions of erythrocytes.
The protection against a specific infectious disease that arises when all or nearly all of a population is vaccinated is termed
A) immune preparedness. B) mandatory vaccination. C) government-controlled health care. D) herd immunity.
The Michaelis constant
A) can be determined using the Lineweaver–Burk plot. B) is equal to twice the Vmax. C) is equal to the substrate concentration at Vmax/2. D) can be determined using the Lineweaver–Burk plot and is equal to the substrate concentration at Vmax/2. E) can be determined using the Lineweaver–Burk plot and is equal to twice the Vmax.
Bacteria protect their own DNA from restriction enzyme damage by adding ________ groups to certain nucleotides
A) methyl B) hydroxyl C) phosphate D) amino E) carboxyl