Which of the following is a characteristic by which viruses are classified?

A. type of nucleic acid
B. type of life cycle
C. number of chromosomes
D. type of host
E. size


Answer: A

Biology & Microbiology

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When macrophages bind antigens, they secrete

____ to attract more phagocytic cells.

a. more antigens b. MHC c. cytokines d. antibodies e. complement

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Which of the following bacteria are associated with enterotoxins?

A. Clostridium botulinum B. Clostridium tetani C. Neither Clostridium tetani nor Clostridium botulinum D. Both Clostridium tetani and Clostridium botulinum

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