Cells must efficiently transfer energy from their energy-trapping systems to the systems actually carrying out work and also use various metabolic processes to replace the energy used in doing work. This is called the ________ ________.

Fill in the blank(s) with the appropriate word(s).


energy cycle

Biology & Microbiology

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Which of the following protein classes are not found as membrane proteins?

A. transport channels B. hormones C. receptors D. enzymes E. identity markers

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Actual gas exchange occurs through the walls of the ____

a. arteries b. arterioles c. capillaries d. veins e. venules

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Moistening and lubrication of food occurs in the

human a. mouth. b. esophagus. c. stomach. d. duodenum. e. jejunum.

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This newly identified organism has been discovered to live on our skin

a. reduce pH b. increase pH c. no effect

Biology & Microbiology