The DNA of a ________ is wrapped around histone molecules to form a "beaded string."
A. bacterium
B. eukaryote
C. prokaryote
D. All of the answer choices are correct.
Answer: B
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The Cystoisospora belli organism, which contains two sporocysts with four sporozoites each, is recovered from fecal specimens and has also been implicated in traveler's diarrhea. The drug of choice to treat infection caused by C. belli is:
a. trimethoprim-sulfamethoxazole combina-tion. b. tetracycline. c. albendazole. d. flagyl.
Some viruses have an additional coating on the outside of the capsid, acquired from the host cell. What is this additional coating called?
a. plasma membrane b. nucleic coat c. envelope d. proteoglycan
Which of the following lung volumes change during exercise?
a. residual volume b. tidal volume c. vital capacity d. lung capacity e. lung volume
Clownfish and sea anemones live together each benefiting the other. The clownfish protects the sea anemone from predators and the sea anemone provides food and protection for the clownfish. This relationship is called
a) commensalism b) predation c) parasitism d) mutualism