A virulence factor common to many members of the Enterobacteriaceae which permits them to deliver harmful proteins directly to cells is
A) fimbriae.
B) a glycocalyx.
C) type III secretion system.
D) pili.
E) porins.
C
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At the end of glycolysis, the carbon molecules originally found in the starting glucose molecule are in the form of:
A. one pyruvate molecule. B. two pyruvate molecules. C. two ATP molecules. D. two NADH molecules. E. four ATP molecules.
Both Streptococcus pyogenes and Corynebacterium diphtheriae are highly pathogenic, and the disease symptomology can be very severe. Why is this?
A. They induce autoimmune states in the patients. B. There are no antibiotics useful for diseases caused by these bacteria. C. Infants and children are the high-risk groups, and their mortality rate is higher than for other ages. D. Both bacteria produce potent exotoxins.
Referring to the above diagram of the brain, which letter identifies the lobe of the cerebrum that is responsible for
integration of visual signals?
a. A b. B c. C d. D e. both the A and B lobes participate in the integration of visual signals
Viruses that attack bacteria are called
A. proviruses. B. virulent. C. phages. D. lytic.