Enzymes

What is the role of enzymes in metabolism?

• Enzymes facilitate metabolic reactions, including catabolism and anabolism.

• Enzymes inhibit metabolic reactions to maintain homeostasis.

• Enzymes are only involved in catabolic reactions.

• Enzymes store energy for metabolic processes.

What is the optimal temperature for enzyme activity based on typical graphs?

• 25°C

• 30°C

• 35°C

• 40°C

What is the significance of enzyme concentration in reactions?

• Higher enzyme concentration can increase the rate of reaction, assuming substrate is available.

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

• Higher enzyme concentration decreases the rate of reaction due to saturation.

• Enzyme concentration only affects the temperature of the reaction.

How do inhibitors affect enzyme activity?

• Inhibitors increase enzyme activity by enhancing substrate binding.

• Inhibitors decrease enzyme activity by preventing substrate binding or altering the enzyme's shape.

• Inhibitors have no effect on enzyme activity.

• Inhibitors only affect the rate of product formation.

How do enzymes affect the activation energy of a reaction?

• They increase the activation energy.

• They have no effect on the activation energy.

• They lower the activation energy.

• They completely eliminate the activation energy.

What is the effect of pH on enzyme activity?

• Enzymes are not affected by pH levels.

• Enzymes have optimal pH levels; deviations can lead to denaturation.

• All enzymes work best at a pH of 7.

• pH has no effect on enzyme activity.

What are the building blocks of enzymes?

• Nucleotides

• Fatty acids

• Amino acids

• Monosaccharides

What is the difference between competitive and non-competitive inhibition?

• Competitive inhibitors bind to the active site, while non-competitive inhibitors bind to another site.

• Both types of inhibitors bind to the active site.

• Non-competitive inhibitors increase the reaction rate, while competitive inhibitors decrease it.

• Competitive inhibitors bind to an allosteric site, while non-competitive inhibitors bind to the active site.

What is the primary function of enzymes in biological reactions?

• Enzymes slow down chemical reactions.

• Enzymes speed up chemical reactions.

• Enzymes convert energy into matter.

• Enzymes act as a source of energy.

What happens to an enzyme when it is denatured?

• It loses its shape.

• It becomes more active.

• It increases in size.

• It changes its color.