Enzymes and digestion

What is a substance called if it speeds up a chemical reaction?

• reusable
• catalyst
• specific
• fragile

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .
  

Tags

NGSS.MS-PS1-2

Enzymes are...

• nucleic acids
• proteins
• lipids
• carbohydrates

Tags

NGSS.MS-LS1-7

What happens when enzymes are heated to a high temperature?

• The enzymes die.
• The shapes of the enzyme are altered denature
• The enzymes' amino acid sequence changes.
• The enzymes remain the same

Which enzyme breaks down starch?

• amylase

• protease

• lipase

• maltase

Which enzyme is produced in the stomach?

• amylase

• protease

• lipase

• All the above

Tags

NGSS.MS-LS1-7

Name the part of the enzyme that has a special shape to fit the substrate

• key position

• product formation zone

• interesting area

• active site

What does bile do to fat?

• emulsifies it into small droplets

• decreases the surface area by emulsification

• Breaks it down to fatty acids

• creates a more acidic pH

Tags

NGSS.MS-LS1-7

When lipase acts on fats, what are the products?

• lactose and glucose

• fatty acids and glycerol

• amino acids

• glycogen and insulin

Why does bile help fat digestion?

• It provides acidic conditions for lipase

• It increases the temperature by respiration

• It produces a larger surface area for lipase to work on

• It kills harmful bacteria