Which of the following statements regarding Streptococcus pyogenes is FALSE?
A. It produces protein A, which inhibits opsonization.
B. It is beta-hemolytic.
C. It has group A Lancefield antigens.
D. It produces streptolysins.
E. It can be lysogenized by a temperate bacteriophage to produce erythrogenic toxins.
Answer: A
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In the spiral staircase analogy of DNA structure, each railing represents a _______________________
A. sugar-phosphate backbone, and each step represents a pair of nitrogenous bases B. sugar-phosphate backbone, and each step represents a nitrogenous base C. nitrogenous base, and the steps represent the sugar-phosphate backbone of the DNA molecule
The process by which RNA is converted into protein is called transcription
Indicate whether the statement is true or false.
Melanoma (skin cancer) can develop after several mutations occur in skin cells. If a woman is diagnosed with melanoma and becomes pregnant, what are the chances that her offspring will inherit melanoma?
A) The offspring will certainly be born with melanoma. B) There is a chance, but it depends on how serious the mother's melanoma is. C) There is a chance, but it depends on whether or not the father has melanoma. D) It is unlikely that the offspring will be born with melanoma.
The reaction (H2 + F2 ? 2HF) is an example of a redox reaction. In reality, two half reactions are occurring. The half reaction (H2 ? 2H+ + 2e-) is a(n)
A. potential energy reaction. B. reduction reaction. C. redox reaction. D. oxidation reaction.