Retroviruses have the following characteristics, except
A. reverse transcriptase.
B. DNA genome.
C. envelope.
D. glycoprotein spikes.
E. viral genes that integrate into the host genome.
Answer: B
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A positive test was observed on a serum sample that resulted in the formation of a fine precipi-tate on a reaction card. The most likely organism serologically identified is:
a. Chlamydia trachomatis. b. Bacillus anthracis. c. Treponema pallidum. d. Toxoplasma gondii.
Glycerol forms the backbone of
a. triglycerides. b. polysaccharides and nucleic acids. c. nucleic acids. d. polypeptides. e. triglycerides and phospholipids.
In eukaryotic cells, the sequences of mRNA that are removed from an mRNA molecule before being translated are
A. exons. B. anticodons. C. proteomes. D. terminators. E. introns.
What is the general term for observable changes in cells that occur as a result of the viral infection?
A) cytopathic effects B) inclusion bodies C) syncytium D) transformation bodies