AP Bio Insta-Review Topic 3.4: Cellular Energy

Front

What does the second law of thermodynamics state about disorder?

Back

Every reaction increases the entropy.

Front

What characterizes an endergonic reaction?

Back

It has a positive ΔG and is nonspontaneous.

Front

What does the second law of thermodynamics imply about the universe?

Back

Every reaction increases the entropy of the universe.

Front

In a reaction A → B → C → D, if enzyme B is inhibited, what happens to the concentration of C?

Back

The concentration of C decreases.

Front

What type of reaction is characterized by a release of energy?

Back

Exergonic reaction.

Front

Define entropy in the context of thermodynamics.

Back

Entropy is a measure of disorder or randomness in a system.

Front

What is the relationship between ΔG and spontaneity of a reaction?

Back

A negative ΔG indicates a spontaneous reaction, while a positive ΔG indicates a nonspontaneous reaction.

Front

What is an example of an exergonic reaction?

Back

Cellular respiration is an example of an exergonic reaction.

Front

How does an enzyme affect the activation energy of a reaction?

Back

An enzyme lowers the activation energy, making the reaction proceed faster.

Front

What is the significance of the Gibbs free energy equation?

Back

It helps predict whether a reaction will occur spontaneously based on enthalpy and entropy changes.