Prions are
A. strands of nucleic acids encased in a protein coat.
B. viral nucleic acids integrated into the host chromosomes.
C. viral-infected cells.
D. infectious proteins with no associated nucleic acid.
E. proteins coded by genes.
D. infectious proteins with no associated nucleic acid.
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There are no known human diseases that have been linked to prions.
Answer the following statement true (T) or false (F)
HIV/AIDS can be categorized as a new or emerging infectious disease. By putting it into this category, we are effectively saying that
A. this infection hasn't been observed in the human population prior to recent (approximately 50 years or sooner) outbreaks. B. this disease has been in susceptible populations for centuries, but has only recently achieved infection levels that became detectable. C. the infectious agent is still evolving and changing, unlike with older, more established diseases such as plague or polio. D. the disease has always been in susceptible populations and causing disease, but we lacked the technology to detect it.
Which of the following is not a type of true fungus?
a. puff balls b. mushrooms c. slime molds d. morels e. yeasts
In C3 plants, the Calvin cycle occurs in the chloroplasts of ________ cells, but in C4 plants, the Calvin cycle occurs in the ________ cells
Fill in the blank(s) with correct word