Contact with a minute quantity of blood is sufficient for infection with hepatitis B virus.
Answer the following statement true (T) or false (F)
True
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This hemorrhagic fever causes disease in humans and nonhuman primates such as chimpanzees, gorillas, and monkeys. It is identified in the laboratory using which type of assay?
a. Immunodiffusion b. Peptide nucleic acid fluorescence in situ hybridization (PNA-FISH) c. Transcription-mediated amplification (TMA) d. Reverse-transcriptase polymerase chain reaction (PCR)
Dormant structures formed by certain bacteria in response to unfavorable environmental conditions are called ____
a. capsids b. endospores c. endotoxins d. exotoxins e. heterocysts
A rod-shaped bacterium’s length of 1.50 ?m can
also be expressed as a. 0.0015mm. b. 0.00015cm. c. 1.5x10-6m. d. 1.5x10-4cm. e. all of these.
The white cliffs of Dover are composed mostly of foraminiferans shells. These organisms move by pseudopodia and feed by phagocytosis. Foraminiferan shells are made of which of the following?
a. Cellulose b. Calcium carbonate c. Chitin d. Peptidoglycan e. Silica