Which of the following is associated with the lubrication of joints?

A) chondroitin sulfate
B) lignins
C) hyaluronate
D) keratan sulfate
E) pectins


Answer: C

Biology & Microbiology

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Marsupials:

A. are only found today in Australia. B. lay eggs. C. nurse their young. D. may reproduce via asexual reproduction.

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The subunits of proteins are ________

a. monosaccharides b. nucleotides c. amino acids d. fatty acids

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Which of the following has the greatest potential to damage hair cells after prolonged exposure?

A) Noisy restaurant B) Two humans talking C) Noise from an urban street D) MP3 player E) A car engine

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Hydrogen sulfide is highly toxic because it

a. forms sulfuric acid. b. denatures proteins. c. binds the iron in heme. d. binds the iron in cytochromes.

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