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- 1. Multiple ChoiceWhat is a substance called if it speeds up a chemical reaction?reusablecatalystspecificfragile
- 2. Multiple Choice
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 5.8The enzyme’s activity increases as pH increases 5.0 to 9.0The enzyme’s activity is greater around pH of 8.0 . - 3. Multiple ChoiceEnzymes are...nucleic acidsproteinslipidscarbohydrates
- 4. Multiple ChoiceWhat happens when enzymes are heated to a high temperature?The enzymes die.The shapes of the enzyme are altered denatureThe enzymes' amino acid sequence changes.The enzymes remain the same
- 5. Multiple Choice
Which enzyme breaks down starch?
amylase
protease
lipase
maltase
- 6. Multiple Choice
Which enzyme is produced in the stomach?
amylase
protease
lipase
All the above
- 7. Multiple Choice
Name the part of the enzyme that has a special shape to fit the substrate
key position
product formation zone
interesting area
active site
- 8. Multiple Choice
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
- 9. Multiple Choice
When lipase acts on fats, what are the products?
lactose and glucose
fatty acids and glycerol
amino acids
glycogen and insulin
- 10. Multiple Choice
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
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