The Lipoteichoic acid in the cell wall of streptococcus pyogenes is considered a virulent factor because it
A. is antiphagocytic
B. binds to the epithelial cells
C. mediates intermalization by host cells
D. degrades complement component C3b
E. binds to IgA
Ans: B. binds to the epithelial cells
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Adult T-cell leukemia is thought to be caused by
A. parvoviruses. B. herpesviruses. C. picornaviruses. D. retroviruses.
If DNA were a positively charged rather than negatively charged, what change to the gel electrophoresis procedure must be made?
A. DNA must be loaded at the positive pole rather than at the negative pole. B. Migration time of restriction fragments must be increased. C. Type of buffer used must be basic rather than neutral. D. All of the choices are correct.
What needs to happen for menstruation to begin?
a. Estrogen levels must rise. b. FSH and LH levels must rise. c. Progesterone levels must rise. d. Progesterone levels must fall.
Discuss one of the pros and cons regarding the application of recombinant DNA technology
What will be an ideal response?