Amino acid sequences that are rich in lysine and protrude from the histone proteins in the nucleosome are called "tails."
A. true
B. false
A
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Many childhood diseases caused by viral infections of the upper respiratory tract can usually be diagnosed by
A. inspection of the rash. B. the type of cough. C. the type of fever. D. the incubation period.
T cells that bind to the antigen-MHC complexes of
dendritic cells become activated and later a. produce antibodies. b. become NK cells. c. bind to B macrophages activating them. d. differentiate into helper T cells and memory T cells. e. activate complement
Which of the following is an advantage of bacterial culture in diagnosing an infection?
A. Standardized, selective media can differentiate bacteria based on their ability to grow. B. AH bacteria can be easily evaluated by culture. C. The method is very rapid. D. The method rarely poses risks to laboratory personnel
The portion of the body that ultimately controls the female menstrual cycle is the
A. hypothalamus. B. uterus. C. anterior pituitary. D. ovaries.