Which of the following hydrocarbon compounds are MOST recalcitrant?

A) straight-chain hydrocarbons
B) ethane
C) polycyclic hydrocarbons
D) propane


Answer: C

Biology & Microbiology

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The chorion of amniotic eggs functions in:

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From X-ray diffraction data, which of the

following was determined about DNA?

a. The amount of adenine equaled the amount of thymine. b. Different species have different proportions of adenine and guanine. c. Nitrogen containing bases were arranged on the outside of the double helix structure. d. The shape of the molecule could be a double helix. e. All of these were determined

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The filaments typically grow as an extensive mesh

called a __________. Fill in the blank(s) with the appropriate word(s).

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The tolerance of facultative anaerobic bacteria to lethal superoxide when they are exposed to air is due to

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