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

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology