What type of vaccine is the hepatitis B vaccine?
A. inactivated whole pathogen
B. attenuated vaccine
C. toxoid vaccine
D. a recombinant vaccine composed of a single antigen of the hepatitis virus
E. a vaccine produced by treating the virus with formaldehyde
Answer: D
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Which of the following processes is not a part of metagenomic analysis of an environment?
A. Polymerase chain reaction B. Extraction of DNA from original sample C. DNA sequence assembly D. Reverse transcription E. High-throughput sequencing
As the magnification of a series of objective lenses increases, the working distance
A. decreases. B. stays the same. C. increases. D. cannot be predicted.
The conversion of nitrate (NO3-) to nitrogen gas (N2) is called ________.
A. ammonification B. nitrogen fixation C. photosynthesis D. nitrification E. denitrification
A patient has a paroxysmal cough and mucus accumulation. What is the etiology of the symptoms?
A) Bordetella B) Corynebacterium C) Burkholderia D) Mycobacterium E) Mycoplasma