pH and enzyme activity

What is pH?

pH is a measure of the acidity or basicity of a solution on a scale of 0 to 14.

How does pH affect enzymes?

Enzymes have optimal pH levels where they function best; deviations can decrease activity.

True or false: All enzymes work best at pH 7.

False, because different enzymes have varying optimal pH levels.

What happens at extreme pH values?

Extreme pH can denature enzymes, altering their structure and function.

Fill in the blank: Enzymes are ______ that speed up chemical reactions.

catalysts

Difference between acidic and basic pH?

Acidic pH < 7, basic pH > 7; affects enzyme shape and activity.

What is an enzyme's active site?

The active site is where substrate molecules bind and undergo a chemical reaction.

How does temperature interact with pH and enzymes?

Temperature can affect enzyme shape; combined with pH, it influences enzyme activity.

Question: What factors influence enzyme activity?

pH, temperature, concentration of substrates, and presence of inhibitors.

True or false: A buffer helps maintain pH levels.

True, because buffers resist changes in pH when acids or bases are added.

What is a substrate?

A substrate is the reactant molecule that an enzyme acts upon.

Question: Define denaturation in enzymes.

Denaturation is the process where an enzyme loses its functional shape due to environmental changes.