Guided course 03:48Environmental Factors Affecting Enzyme ActivityJason Amores Sumpter9022views138rank2comments
Multiple ChoiceWhich of the following are examples of the functions of enzymes?3355views22rank1comments
Multiple ChoiceWhich characteristics are likely associated with an enzyme isolated from a human stomach where conditions are strongly acidic?2845views25rank2comments
Multiple ChoiceWhich of the following is changed by the presence of an enzyme in a reaction? and 1012views
Multiple ChoiceWhich of the following statements about the active site of an enzyme is correct? 1927views2rank
Multiple ChoiceWhich of the following statements correctly describe(s) the role or roles of heat in biological reactions? 1104views2rank
Multiple ChoiceWhich of the following environments or actions would not affect the rate of an enzyme reaction? 1105views2rank
Textbook QuestionAdd labels to the figure that follows, which illustrates the breakdown of a disaccharide inside a cell. 829views
Textbook QuestionHow does pH affect enzyme-catalyzed reactions? a. Protons serve as substrates for most reactions. b. Energy stored in protons is used to drive endergonic reactions. c. Proton concentration increases the kinetic energy of the reactants, enabling them to reach their transition state. d. The concentration of protons affects an enzyme's folded structure and reactivity.1172views
Textbook QuestionWhich of the following is a false statement regarding enzymes? a. Enzymes are proteins that speed up metabolic reactions; b. Enzymes have specific substrates; c. Enzymes supply ATP to their substrates; d. An enzyme may be used many times.1989views
Textbook QuestionIf an enzyme in solution is saturated with substrate, the most effective way to obtain a faster yield of products is to a. add more of the enzyme. b. heat the solution to 90°C. c. add more substrate. d. add a noncompetitive inhibitor.1691views
Textbook QuestionSome bacteria are metabolically active in hot springs because a. they are able to maintain a lower internal temperature. b. high temperatures make catalysis unnecessary. c. their enzymes have high optimal temperatures. d. their enzymes are completely insensitive to temperature.2003views
Textbook QuestionEnzymes usually function best at an optimal pH and temperature. The following graph shows the effectiveness of two enzymes at various temperatures. (c) From what you know about enzyme structure, explain why the rate of the reaction catalyzed by enzyme A slows down at temperatures above 40°C (140°F).1172views
Textbook QuestionEnzymes usually function best at an optimal pH and temperature. The following graph shows the effectiveness of two enzymes at various temperatures. (b) One of these enzymes is found in humans and the other in thermophilic (heat-loving) bacteria. Which enzyme would you predict comes from which organism?1348views
Textbook QuestionEnzymes usually function best at an optimal pH and temperature. The following graph shows the effectiveness of two enzymes at various temperatures. (a) At which temperature does enzyme A perform best? Enzyme B?1105views
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