Which of the following statements does not pertain to Streptococcus pyogenes?

A. It is often spread from an endogenous source.
B. It causes gas gangrene.
C. It secretes streptokinase.
D. It causes impetigo.
E. It coats itself with host proteins.


Answer: B

Biology & Microbiology

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Which of the neuroimaging techniques requires a small amount of radioactivity to be injected into the bloodstream?

a) PET b) fMRI c) MRI d) EEG

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While examining her patient's nose, Dr. Carlita Gonzales, an allergy specialist, noted a hole in the partition between the nasal cavities. The doctor suspects her patient is snorting which drug?

A) cocaine B) alcohol C) mescaline D) marijuana

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Which of the following does NOT constitute an advantage of using two antibiotics together?

A) It can prevent drug resistance. B) It lessens the toxicity of individual drugs. C) Two are always twice as effective as one. D) It allows treatment to be provided prior to diagnosis. E) All of these are advantages of using two antibiotics together.

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What are groups of cells that perform the same function called?

a. molecules b. organs c. plastids d. tissues

Biology & Microbiology