Enzymes

True or False: Every enzyme has an optimal temperature and pH at which it functions best.

• True

• False

• Sometimes

• Only in certain conditions

What term is used to describe a substance that speeds up a chemical reaction?

• Catalyst

• Inhibitor

• Solvent

• Reagent

What is the optimum pH of an enzyme if a graph indicates maximum activity at pH 6.6?

• 5.5

• 6.0

• 6.6

• 7.0

What happens to enzymes when they are exposed to high temperatures?

• They become more active and efficient.

• They are destroyed completely.

• The shapes of the enzymes are altered, which can lead to denaturation and loss of function.

• They function better at higher temperatures.

What is the significance of enzyme concentration in a reaction?

• Increasing enzyme concentration decreases the rate of reaction.

• Increasing enzyme concentration generally increases the rate of reaction, provided there is enough substrate available.

• Enzyme concentration has no effect on the rate of reaction.

• Decreasing enzyme concentration increases the rate of reaction.

What is the effect of pH on enzyme activity?

• Each enzyme has an optimal pH range; deviations from this range can decrease activity or denature the enzyme.

• pH has no effect on enzyme activity.

• All enzymes work best at a pH of 7.

• Enzymes are only active in acidic conditions.

What is enzyme specificity?

• The ability of an enzyme to catalyze any substrate without preference.

• The ability of an enzyme to select and catalyze a specific substrate among many possible candidates.

• The process by which enzymes are denatured at high temperatures.

• The general activity of enzymes in speeding up chemical reactions.

What is the role of the active site in an enzyme?

• The active site is the region on the enzyme where substrate molecules bind and undergo a chemical reaction.

• The active site is where the enzyme is produced within the cell.

• The active site is responsible for the enzyme's structural integrity.

• The active site is the part of the enzyme that determines its color.

What is the term for the process by which an enzyme loses its functional shape?

• Denaturation

• Hydrolysis

• Saturation

• Coagulation

How does temperature affect enzyme activity?

• Enzyme activity decreases with temperature at all times.

• Enzyme activity increases with temperature up to a certain point, then decreases due to denaturation.

• Temperature has no effect on enzyme activity.

• Enzyme activity is highest at very low temperatures.