For osmosis to occur, ____

a. a selectively permeable membrane must be present
b. a concentration gradient cannot exist
c. cellular energy must be expended
d. pure water must be on one side of the membrane
e. only solutes can pass through the membrane


A

Biology & Microbiology

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In the final phases of digestion, ____

a. the end products are absorbed only into the blood b. stomach enzymes finish digestive activity c. the liver releases digestive enzymes into the duodenum d. the end products are absorbed across brush border cells e. large proteins and carbohydrates are absorbed into the blood

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A ________ feeds on its host organism, but does not kill it immediately

Fill in the blank(s) with correct word

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C6H12O6 + C6H12O6 ? C12H22O11 + H2O is an example of

A. a hydrolytic reaction. B. denaturation. C. formation of a peptide bond. D. a decomposition reaction. E. dehydration synthesis.

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Bacteria of the genus Mycoplasma lack cell walls. What sort of environment do they require for survival?

A. low temperature B. hypotonic C. isotonic D. hypertonic E. a biofilm

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