in which of the following scenarios may a bactericidal drug be chosen
a. Your otherwise healthy patient has bacterial conjunctivitis caused by the Gram-negative bacterium Haemophilus aegyptius.
b. Your otherwise healthy patient has pinworm caused by the roundworm Enterobius vermicularis.
c. Your pediatric patient has bacterial meningitis caused by the Gram-positive bacterium Streptococcus agalactiae.
d. Your immunocompromised patient has a severe case of infectious mononucleosis caused by Epstein Barr virus.
Answer; c. Your pediatric patient has bacterial meningitis caused by the Gram-positive bacterium Streptococcus agalactiae.
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Transparent double-sided dishes used for growing microbes are most commonly called
A) Petri dishes. B) baker dishes. C) sterilization plates. D) culture medium plates.
Which line of evidence supports the protein-first hypothesis?
a. Amino acids existed on prebiotic Earth and in meteorites. b. Proteins display more chemical diversity than nucleic acids. c. Proteins display more structural diversity than nucleic acids. d. Protein function can be reproduced in a population. e. Nucleic acids are too simple to have been the first "polymers of life."
The atomic nucleus consists of
a. neutrons and electrons. b. neutrons only. c. protons and electrons. d. neutrons and protons. e. protons only.
Vitamin B9 regulates synthesis of (A)_________ , and its deficiency leads to defects in (B)_____________.
a. (A) dTTP, (B) DNA synthesis b. (A) dCTP, (B) mitosis