A tautomer is an uncommon form of DNA base that naturally exists along with the common form
Indicate whether the statement is true or false
TRUE
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Which of the following is not true of viruses?
A. Viruses replicate by binary fission. B. Viruses are acellular. C. Viruses consist of one or more molecules of DNA or RNA enclosed in a coat of protein and sometimes in other more complex layers. D. Viruses can exist in two phases: intracellular and extracellular.
The hemoglobin gene is the only gene that is under selection for resistance to malaria
A. true B. false
MacConkey agar serves which purpose when used in the bacterial fecal culture?
a. Evaluation of general flora and predomi-nant species b. Selection of enteric pathogens such as Salmonella, Aeromonas, and others c. Inhibition of normal flora and selection of enteric pathogens d. Enrichment for enteric pathogens such as Salmonella and others
Mycobacterium leprae is typically found infecting the ears, toes, and fingers of its host due to its
A. requirement for well-oxygenated blood. B. easy access to those parts. C. need for cooler temperatures. D. long incubation period.