Textbook Question
What is meant by the term induced fit?
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Ch. 4 - Body Weight and Health
Belk, Maier6th EditionBiology: Science for LifeISBN: 9780135214084
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Table of contents
- Ch. 1 - Can Science Cure the Common Cold?12
- Ch. 2 - Science Fiction, Bad Science, and Pseudoscience12
- Ch. 3 - Is It Possible to Supplement Your Way to Better Performance and Health?10
- Ch. 4 - Body Weight and Health10
- Ch. 5 - Life in the Greenhouse10
- Ch. 6 - Cancer10
- Ch. 7 - Fertility10
- Ch. 8 - Does Testing Save Lives?10
- Ch. 9 - Biology of Wrongful Convictions10
- Ch. 10 - Genetically Modified Organisms10
- Ch. 11 - Where Did We Come From?13
- Ch. 12 - An Evolving Enemy8
- Ch. 13 - Understanding Race11
- Ch. 14 - The Greatest Species on Earth?8
- Ch. 15 - Is the Human Population Too Large?10
- Ch. 16 - Conserving Biodiversity12
- Ch. 17 - The Human Footprint10
Belk, Maier6th EditionBiology: Science for LifeISBN: 9780135214084Not the one you use?Change textbook
Chapter 4, Problem 4
Which 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.
Verified step by step guidance1
Step 1: Understand the role of enzymes in biological systems. Enzymes are biological catalysts, typically proteins, that speed up chemical reactions by lowering the activation energy required for the reaction to occur.
Step 2: Analyze each statement provided in the question. For example, statement (a) says enzymes are proteins that speed up metabolic reactions. This is true because enzymes act as catalysts in metabolic pathways.
Step 3: Evaluate statement (b), which states that enzymes have specific substrates. This is also true because enzymes exhibit specificity, meaning they bind to specific molecules (substrates) at their active sites.
Step 4: Examine statement (c), which claims that enzymes supply ATP to their substrates. This is false because enzymes do not supply ATP; instead, they may facilitate reactions that involve ATP, but they do not directly provide it.
Step 5: Review statement (d), which states that an enzyme may be used many times. This is true because enzymes are not consumed in the reactions they catalyze and can be reused multiple times.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Enzyme Function
Enzymes are biological catalysts that accelerate chemical reactions in living organisms. They lower the activation energy required for reactions, allowing metabolic processes to occur more efficiently. Enzymes are crucial for various biological functions, including digestion and energy production.
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Functions of Enzymes
Substrate Specificity
Enzymes exhibit specificity for their substrates, meaning each enzyme typically catalyzes a specific reaction with a particular substrate. This specificity is due to the unique shape and chemical properties of the enzyme's active site, which only fits certain substrate molecules, akin to a lock and key mechanism.
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Enzyme Recycling
Enzymes are not consumed in the reactions they catalyze; instead, they can be reused multiple times. After facilitating a reaction, an enzyme returns to its original state, ready to bind to new substrate molecules. This property makes enzymes highly efficient in metabolic pathways.
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Related Practice
Textbook Question
Add labels to the figure that follows, which illustrates the breakdown of a disaccharide inside a cell.
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Textbook Question
What are the reactants and products of cellular respiration?
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Textbook Question
Enzymes speed up chemical reactions by ________.
a. Heating cells
b. Binding to substrates and placing stress on their bonds
c. Changing the shape of the cell
d. Supplying energy to the substrate
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Textbook Question
What would happen if activation energy barriers didn't exist?
a. Substrates would not bind properly to enzymes.
b. Chemical reactions in the body would never occur.
c. Enzyme function would not be affected.
d. Metabolic reactions would proceed even if their products were not needed.
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Textbook Question
Cellular respiration involves ________.
a. The aerobic metabolism of sugars in the mitochondria by a process called glycolysis.
b. An electron transport chain that releases carbon dioxide.
c. The synthesis of ATP, which is driven by the rushing of protons through an ATP synthase.
d. Electron carriers that bring electrons to the citric acid cycle; e. the production of water during the citric acid cycle.
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