Class I MHC proteins are found ONLY on the surface of B lymphocytes, macrophages, and dendritic cells
Indicate whether the statement is true or false.
Answer: FALSE
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Since viruses are typically 20-200 nm in diameter, the ____ microscope is best for viewing them
a. light b. electron c. fluorescent d. polarizing e. contrasting
Peptide bonds form between ____
a. two amino groups b. two carboxyl groups c. a carboxyl group and an R group d. an amino group and a carboxyl group e. an amino group and an R group
In trisomy 21 no genetic information is missing from these individuals, but an abnormal copy of this
chromosome creates a genetic imbalance which causes abnormal physical and mental development. _________________ Indicate whether the statement is true or false.
Bacteria are most essential in the cycling of:
a. carbon. b. water. c. phosphorus. d. nitrogen. e. energy.