BIOL 1201 : Exam 2 Quizlet Question (on Test)
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In general, enzymes are what kinds of molecules? proteins enzymes work by ____ reducing activation energy an enzyme is ____ an organic catalyst. What name is given to the reactants in an enzymatically catalyzed reaction? substrate. As a result of its involvement in a reaction, an enzyme _____. is unchanged. A molecule characterized by a hydrophilic head group and two hydrophobic tails is a(an) phospholipid. The water-soluble portion of a phospholipid is the polar head, which generally consists of a glycerol molecule linked to a phosphate group. true. If a red blood cell is placed in a salt solution and bursts, what is the tonicity of the solution relative to the interior of the cell? hypotonic. Membrane proteins help move molecules across the membrane. Which of the following transporters does not use passive transport to move molecules across a membrane? sodium-potassium pump. Active transport differs from passive transport in that active transport does not require an input of energy false.
