A virion is composed of
A.
lipid, protein, and either RNA or DNA.
B.
protein and either RNA or DNA, but no lipid.
C.
protein and both RNA and DNA, but no lipid.
D. protein, either RNA or DNA, and possibly lipid.
D
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Which viruses have single-stranded RNA that acts as a template for DNA synthesis?
A) lytic phages B) proviruses C) viroids D) bacteriophages E) retroviruses
Which are synthesized in the nucleoli found within the nucleus?
a. mRNAs b. ribosomal subunits c. chromatin d. proteins
A pathogen is best described as
A) a microorganism that remains with the person throughout life. B) any microorganism that causes disease. C) an organism that remains in the body for a short time. D) a microorganism that may cause a disease under certain circumstances. E) a source of microbial contamination.
Which of the following would be easiest to observe contamination after incubation?
A) A liquid broth culture in a test tube B) Isolated colonies on an agar plate C) Confluent growth (total coverage without isolated colonies, aka a "lawn") on an agar plate D) Growth on an agar slant