Enzyme Function

What is the primary function of enzymes?

• Store energy in cells

• Speed up biological reactions

• Break down biological molecules

• Regulate body temperature

How do enzymes speed up chemical reactions?

• By lowering the activation energy

• By changing the temperature of the reaction

• By inhibiting the reaction

• By increasing the activation energy

What is the term used to describe the substance that an enzyme acts upon?

• product

• catalyst

• reactant

• substrate

What is the lock and key model of enzyme-substrate interaction?

• The lock and key model of enzyme-substrate interaction is a model that describes how enzymes and substrates interact.

• The lock and key model of enzyme-substrate interaction is a model that describes how enzymes and inhibitors interact.

• The lock and key model of enzyme-substrate interaction is a model that describes how enzymes and products interact.

• The lock and key model of enzyme-substrate interaction is a model that describes how enzymes and coenzymes interact.

What is the induced fit model of enzyme-substrate interaction?

• The induced fit model of enzyme-substrate interaction is a model that describes how enzymes and substrates undergo conformational changes upon binding to each other.

• The induced fit model of enzyme-substrate interaction is a model that describes how enzymes and substrates do not undergo any changes upon binding to each other.

• The induced fit model of enzyme-substrate interaction is a model that describes how enzymes and substrates bind together without any conformational changes.

• The induced fit model of enzyme-substrate interaction is a model that describes how enzymes and substrates only undergo conformational changes after binding to each other.

What factors can affect enzyme activity?

• Light intensity, enzyme shape, concentration of water

• Time, pressure, enzyme size

• Temperature, pH, substrate concentration, enzyme concentration, inhibitors or activators

• pH, temperature, concentration of water

What is the optimal pH range for most enzymes?

• 6 to 8

• Neutral pH

• 10 to 12

• 2 to 4

What is the optimal temperature range for most enzymes?

• 35 to 40 degrees Celsius

• 100 to 200 degrees Celsius

• 50 to 60 degrees Celsius

• 0 to 5 degrees Celsius

What is denaturation of an enzyme?

• The denaturation of an enzyme is the enhancement of its structure resulting in the increase of its biological activity.

• The denaturation of an enzyme is the alteration of its structure resulting in the loss of its biological activity.

• The denaturation of an enzyme is the breakdown of its structure resulting in the loss of its biological activity.

• The denaturation of an enzyme is the process of increasing its biological activity.

What are some examples of enzymes and their functions?

• hemoglobin, myoglobin, collagen

• insulin, glucagon, thyroxine

• amylase, lipase, protease

• glucose, fructose, sucrose