Ch 5 Enzymes Practice

What is an enzyme?

• A type of protein that increases the rate of a chemical reaction

• A type of inorganic catalyst

• A type of carbohydrate that provides energy

• A type of lipid that stores genetic information

Why are enzymes important in all living organisms?

• They help in the breakdown of large molecules

• They increase the rate of chemical reactions

• They provide energy for cellular processes

• They store genetic information

How does an enzyme function as a catalyst?

• By increasing the temperature of the reaction

• By changing the pH of the reaction

• By providing energy for the reaction

• By lowering the activation energy of the reaction

What factors can affect the activity of an enzyme?

• Temperature and pH

• Concentration of the enzyme

• Concentration of the substrate

• All of the above

Which of the following is true about enzymes?

• Enzymes are proteins that can undergo denaturation

• Enzymes are inorganic catalysts

• Enzymes are carbohydrates that provide energy

• Enzymes are lipids that store genetic information

What is the role of enzymes in catabolic reactions?

• Enzymes break down large molecules into smaller molecules

• Enzymes build up large molecules from smaller molecules

• Enzymes provide energy for the reaction

• Enzymes change the pH of the reaction

What is the role of enzymes in anabolic reactions?

• Enzymes break down large molecules into smaller molecules

• Enzymes build up large molecules from smaller molecules

• Enzymes provide energy for the reaction

• Enzymes change the pH of the reaction

What is enzyme-substrate specificity?

• Enzymes can only bind to one specific substrate

• Enzymes can bind to multiple substrates

• Enzymes can bind to any molecule in the reaction

• Enzymes can only bind to inorganic catalysts

What happens to an enzyme when it is exposed to extreme temperatures?

• The enzyme denatures and loses its shape

• The enzyme becomes more active

• The enzyme changes its substrate specificity

• The enzyme breaks down into smaller molecules

What is the optimum temperature for enzyme activity in the human body?

• 0°C

• 25°C

• 37°C

• 50°C