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Ch.19 Enzymes and Vitamins
McMurry - Fundamentals of General, Organic, and Biological Chemistry 8th Edition
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187당신이 사용하는 게 아니라요?교과서 변경
19장, 문제 57c

What general effects would you expect the following changes to have on the rate of an enzyme-catalyzed reaction for an enzyme that has its maximum activity at body temperature (about 37°C)?
c. Adding an oxidizing agent, such as hydrogen peroxide

검증된 단계별 안내
1
Understand the role of an oxidizing agent: An oxidizing agent, such as hydrogen peroxide (H₂O₂), can cause oxidative damage to proteins, including enzymes. This may lead to changes in the enzyme's structure and function.
Recall the importance of enzyme structure: Enzymes are proteins that rely on their specific three-dimensional structure to function properly. Oxidative agents can disrupt this structure by modifying amino acid side chains or breaking disulfide bonds.
Consider the effect on the active site: If the oxidizing agent alters the enzyme's active site, the substrate may no longer bind effectively, reducing the enzyme's catalytic activity.
Evaluate the overall impact on reaction rate: If the enzyme is damaged or its active site is altered, the rate of the enzyme-catalyzed reaction is likely to decrease or stop entirely, depending on the extent of the damage.
Conclude the expected effect: Adding an oxidizing agent, such as hydrogen peroxide, would generally decrease the rate of an enzyme-catalyzed reaction by interfering with the enzyme's structure and function.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Enzyme Activity

Enzyme activity refers to the rate at which an enzyme catalyzes a reaction. Factors such as temperature, pH, and substrate concentration can influence this activity. Enzymes typically have an optimal temperature range, and deviations from this range can lead to decreased activity or denaturation.
추천 영상:
가이드 코스
1:06
Factors Affecting Enzyme Activity Concept 1

Oxidizing Agents

Oxidizing agents, like hydrogen peroxide, can affect enzyme activity by altering the enzyme's structure or the substrate's availability. They can lead to the formation of reactive oxygen species, which may either enhance or inhibit enzyme function depending on the specific enzyme and reaction conditions.
추천 영상:
가이드 코스
1:49
Alcohol Reactions: Oxidation Concept 1

Reaction Rate

The reaction rate is the speed at which reactants are converted into products in a chemical reaction. In enzyme-catalyzed reactions, the rate can be influenced by factors such as enzyme concentration, substrate concentration, and the presence of inhibitors or activators, including oxidizing agents.
추천 영상:
가이드 코스
01:07
Rate of Reaction Concept 1
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교과서 질문

What general effects would you expect the following changes to have on the rate of an enzyme-catalyzed reaction for an enzyme that has its maximum activity at body temperature (about 37°C)?

c. Adding an organic solvent, such as methanol

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The text discusses three forms of enzyme inhibition: uncompetitive inhibition, competitive inhibition, and irreversible inhibition.

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교과서 질문

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교과서 질문

What general effects would you expect the following changes to have on the rate of an enzyme-catalyzed reaction for an enzyme that has its maximum activity at body temperature (about 37°C)?

a. Raising the temperature from 37°C to 70°C

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교과서 질문

How do you explain the observation that pepsin, a digestive enzyme found in the stomach, has a high catalytic activity at pH 1.5, while trypsin, an enzyme of the small intestine, has no activity at pH 1.5?

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