Metal ions bound to enzymes are called _______

A. cofactors
B. coenzymes
C. vitamins
D. metalloids
E. anions


Answer Key: A

Biology & Microbiology

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A nutrient medium that has all of its chemical components identified and their precise concentrations known and reproducible is termed ________.

A. enriched B. reducing C. defined D. complex

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What components of membranes are the most abundant?

a. carbohydrates b. sterols c. proteins d. fats e. phospholipids

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Cholesterol is taken up into most cells of the body by

a. phagocytosis. b. receptor-mediated endocytosis. c. simple diffusion. d. caveolae formation.

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If the wrong protein is produced, it may:

a. affect DNA expression. b. alter cellular structure. c. influence development. d. A and B. e. All of the above.

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