Molly, a 3-year-old active preschool girl, spent the morning playing with the other children at the day-care center. Shortly after lunch, she began to appear very flushed with bright red cheeks, and a check of her temperature revealed a low-grade fever of 99.5. She seemed to feel normal and showed no other signs of illness. Which of the following would be the most likely cause of her fever and bright red cheeks?
A) Human Parvovirus B19
B) Roseola virus (Human herpesvirus 6)
C) Varicella-zoster virus
D) Herpes simplex virus
E) Cytomegalovirus
A) Human Parvovirus B19
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Virginia was working as an undergraduate lab technician, and the graduate student she was working with instructed her to take some E. coli, and treat the culture with MgCl2 and CaCl2 to make the cells competent. Once Virginia produced the competent cells, she was able to
A. make them replicate their own DNA without an origin of replication B. make them susceptible to bacteriophage C. make them pass their DNA to a recipient cell via conjugation D. make them take up naked DNA from their environment E. None of these are correct
During mitosis, kinetochores develop during
A) telophase. B) anaphase. C) metaphase. D) prophase.
An infection indigenous to animals but naturally transmissible to humans is called a zoonosis.
a. true b. false
The first successful treatment of a human genetic disorder through gene therapy was with a disorder known as
A) severe combined immunodeficiency disease. B) diabetes mellitus. C) human dwarfism. D) hemophilia. E) acquired immunodeficiency syndrome.