Understanding Enzymes and Their Role in Cells

What is the primary role of enzymes in a cell?

• To store genetic information

• To carry out chemical reactions quickly

• To provide structural support

• To transport nutrients

What are enzymes made from?

• Lipids

• Carbohydrates

• Amino acids

• Nucleic acids

How many different types of enzymes does a bacterium like E. coli have?

• About 100

• About 1,000

• About 500

• About 10,000

What is the function of the enzyme maltase?

• To break down lactose

• To synthesize proteins

• To break down maltose

• To build cell walls

What happens when an enzyme is formed?

• It becomes a lipid

• It folds into a unique shape

• It dissolves in water

• It loses its function

What is the consequence of lactose intolerance?

• Lactose is converted into maltose

• Lactose is stored as fat

• Lactose is not broken down into glucose

• Lactose is broken down too quickly

What is the active site of an enzyme responsible for?

• Storing energy

• Breaking chemical bonds

• Transporting molecules

• Replicating DNA

How many maltose bonds can a single maltase enzyme break per second?

• In excess of 100

• In excess of 500

• In excess of 1,000

• In excess of 10,000

What is the relationship between enzymes and chemical reactions in cells?

• Enzymes slow down chemical reactions

• Enzymes have no effect on chemical reactions

• Enzymes prevent chemical reactions

• Enzymes speed up chemical reactions

What is the sugar maltose composed of?

• Two sucrose molecules

• Two glucose molecules

• Two lactose molecules

• Two fructose molecules