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Introduction to Biochemistry

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Questions and Answers

Which of the following best describes mechanical energy?

Energy related to heat and temperature
Energy stored in chemical compounds
The energy associated with vibrations
The combination of kinetic energy and potential energy (correct)

What occurs during the transition state of an enzyme-catalyzed reaction?

Substrates are converted to products
The enzyme is permanently altered
Substrate binding causes enzyme shape stabilization
Old bonds break and new ones form (correct)

What is the role of coenzymes in enzyme function?

To bind substrates irreversibly
To permanently alter the enzyme's structure
To provide inorganic ions required for activity
To enhance or assist the activity of enzymes (correct)

What effect does competitive inhibition have on enzyme activity?

<p>Inhibits enzyme activity by competing with substrate for the active site (B)</p> Signup and view all the answers

What distinguishes catabolic pathways from anabolic pathways in metabolism?

<p>Catabolic pathways break down complex molecules, releasing energy, whereas anabolic pathways build new molecules, requiring energy (B)</p> Signup and view all the answers

Flashcards

Chemical Energy

Energy stored in chemical compounds, like the bonds of food molecules.

Enzyme Function

Enzymes increase the rate of chemical reactions by lowering activation energy. They act as catalysts, speeding up the reaction process.

Induced Fit

This occurs when the active site of an enzyme changes shape to fit the substrate more tightly when it binds.

Competitive Inhibition

Inhibitors that bind to the active site of an enzyme and block the substrate from binding. This effectively slows down the reaction rate.

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Catabolic Pathways

This mechanism involves breaking down complex molecules into simpler ones, releasing energy in the process.