Enzymes and Metabolism

Front

What is denaturation in the context of enzymes?

Back

Denaturation is the process where an enzyme's structure is altered due to external factors like high temperature or extreme pH, leading to a loss of its biological activity.

Front

What are enzymes primarily made of?

Back

Enzymes are primarily made of proteins.

Front

Can enzymes be reused in chemical reactions?

Back

No, enzymes can be reused multiple times in chemical reactions, contrary to the misconception that they can only be used once.

Front

What does it mean if the net free energy of a reaction decreases?

Back

If the net free energy decreases, the reaction is exergonic, meaning it releases energy.

Front

What happens to enzymes when exposed to high temperatures?

Back

When exposed to high temperatures, the shapes of the enzymes are altered or denatured, affecting their functionality.

Front

What is the role of enzymes in metabolic reactions?

Back

Enzymes act as catalysts that speed up metabolic reactions by lowering the activation energy required.

Front

What factors can affect enzyme activity?

Back

Factors that can affect enzyme activity include temperature, pH, substrate concentration, and the presence of inhibitors or activators.

Front

What is the active site of an enzyme?

Back

The active site is the specific region of an enzyme where substrate molecules bind and undergo a chemical reaction.

Front

What is the difference between endergonic and exergonic reactions?

Back

Endergonic reactions require energy input (net free energy increases), while exergonic reactions release energy (net free energy decreases).

Front

How does pH affect enzyme activity?

Back

Extreme pH levels can denature enzymes, altering their shape and reducing their activity.