A tautomer is
A) a mutagen.
B) an RNA base.
C) an alternate structure of a molecule.
D) the type of bond that holds DNA bases together.
C) an alternate structure of a molecule.
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When cancer cells have the ability to migrate to other parts of the body, they are said to be
A. invasive. B. benign. C. metastatic. D. oncogenic. E. genetic.
In addition to antimicrobials, patients with diphtheria are treated with ________.
A. heart medication B. bronchoscopy C. antitoxin D. tracheostomy E. All of the choices are correct.
Diastolic pressure is
a. the lowest blood pressure in the aorta. b. the pressure measured when the left ventricle is contracted. c. the peak pressure in the aorta when the left ventricle contracts. d. the difference between the highest and lowest pressures. e. an average of high and low pressures.
In which major taxonomic group of Archaea are the methanogens found?
a. Crenarchaeota b. Korarchaeota c. Nanoarchaeota d. Euryarchaeota