OR Unit 4 Review

Front

What does the change in free energy (G) of a reaction indicate?

Back

It indicates the energy yield of the reaction.

Front

What experimental conditions typically result in the highest rate of enzyme reactions?

Back

Conditions that optimize temperature and pH for the specific enzyme.

Front

What energy transformations are NOT observed in secondary active transport?

Back

Phosphorylation of the sucrose H+ cotransporter.

Front

How do enzymes affect Gibbs free energy in a reaction?

Back

Enzymes do not change the Gibbs free energy of the reaction.

Front

What is the role of an enzyme regarding activation energy?

Back

It decreases the activation energy.

Front

Define activation energy.

Back

The minimum energy required for a chemical reaction to occur.

Front

What is Gibbs free energy?

Back

A thermodynamic potential that measures the maximum reversible work obtainable from a system at constant temperature and pressure.

Front

Explain the concept of enzyme specificity.

Back

Enzymes are specific to substrates, meaning each enzyme only catalyzes a specific reaction or type of reaction.

Front

What is the effect of temperature on enzyme activity?

Back

Enzyme activity typically increases with temperature up to an optimal point, after which it decreases.

Front

What is the significance of pH in enzyme activity?

Back

Each enzyme has an optimal pH range where it functions best; deviations can lead to decreased activity.