How do coronaviruses differ from togaviruses?
A. Coronaviruses have an envelope.
B. Coronaviruses are RNA viruses.
C. Coronaviruses have helical capsids.
D. Coronaviruses contain positive RNA.
E. Coronaviruses individual capsids can be visualized.
Answer: C
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The basis of microarray analysis is:
A. cleaving double-stranded DNA from a test subject with restriction enzymes to see if the subject's DNA has varying distances between cleavage sites. B. using gel electophoresis to determine the number and position of labeled bands after probe hybridization. C. hybridization of single-stranded DNA from a test subject with immobilized singlestranded oligonucleotides of known sequence. D. determining the amino acid sequence of proteins involved in viral infection in order to identify a genotype which is resistant to infection. E. All of the answer choices are part of microarray analysis.
Which category of bacteria provides the greatest benefit to production of crop plants?
a. spirochetes b. heat-loving T. aquaticus c. nitrogen-fixing bacteria d. Agrobacterium e. L. acidophilus
Infectious diseases differ from genetic diseases in that infectious diseases are usually contagious
Indicate whether the statement is true or false
Which of the following is an acid?
A. K2SO4 B. NaNO3 C. CaCO3 D. H3PO4