Trimethoprim and sulfonamides have a(n)

A. antagonistic effect.
B. synergistic effect.
C. energetic effect.
D. subtractive.


B

Biology & Microbiology

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An organ must contain at least

A. two different tissue types. B. two different cell types. C. all four of the tissue types. D. connective tissue. E. two different muscle types.

Biology & Microbiology

Which of the following is NOT a protein involved in DNA replication?

A. replication fork. B. single-stranded binding proteins. C. DNA ligase. D. topoisomerase. E. helicase.

Biology & Microbiology

The chemical bonds that are formed when atoms share electrons equally are called ____

a. polar covalent bonds b. van der Waals forces c. ionic bonds d. hydrogen bonds e. nonpolar covalent bonds

Biology & Microbiology

Most allergy medicines contain antihistamines that block the actions of histamine. These drugs reduce cold symptoms by directly

A. stimulating components of the immune system through the release of cytokines. B. stimulating the production of specific antibodies. C. blocking or reducing the inflammation response in mucous membranes. D. recruiting macrophages to the nasal epithelium. E. lysing virus-infected cells and preventing further propagation of the pathogen.

Biology & Microbiology