Which statement is true of endotoxins?

A) They are released upon cell lysis.
B) They are produced by gram-positive bacteria.
C) They are proteins.
D) They are disease specific.
E) They increase blood pressure.


Ans: A) They are released upon cell lysis.

Biology & Microbiology

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The purple nonsulfur bacteria

A. utilize organic molecules as a source of electrons for photosynthesis. B. typically can grow aerobically in the dark as chemoorganoheterotrophs. C. grow anaerobically as photoorganoheterotrophs. D. All of the choices are correct.

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What kind of bond joins amino acids together to form a protein?

A) Peptide bond B) Hydrogen bond C) Polar bond D) Protein bond

Biology & Microbiology

The algae used to make sushi rolls are classified as ____

a. bacteria b. animals c. plants d. fungi e. protists

Biology & Microbiology

Which of these structures is analogous in function to the tracheoles of insects?

A) Skin of an earthworm B) Body surface of a flatworm C) Bronchi of a human D) Gills of a fish

Biology & Microbiology