A stable atom has ________ in its valence shell.
A. 4 electrons
B. 2 neutrons
C. 8 electrons
D. 8 protons
E. 10 electrons
Answer: C
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B cells interacting with helper T cells are stimulated to differentiate when _____
A) B cells produce IgE antibodies B) B cells release cytokines C) cytotoxic T cells present the class II MHC molecule-antigen complex on their surface D) helper T cells differentiate into cytotoxic T cells E) helper T cells release cytokines
Organ systems typically have just one major function
a. True, all organ systems are interdependent. b. True, each organ system can function independently. c. False, many organ systems have multiple functions. d. False, each organ system can function independently.
Which of the following drug categories are used to treat HIV infections?
A) integrase inhibitors B) protease inhibitors C) reverse transcriptase inhibitors D) DNAse inhibitors E) fusion inhibitors
Which of the following dissociates completely in solution and is considered to be a strong base (alkali)?
A) HCl B) NH3 C) H2CO3 D) NaOH