What are fats made from?
Amino acids
Simple sugars
Fatty acids and glycerol
What are proteins made from?
What are enzymes?
Proteins that act as biological catalysts
Living organisms that act as biological catalysts
Complex carbohydrates that act as biological catalysts
What happens to an enzyme when its active site changes shape irreversibly?
It is killed
It is denatured
It is diffused
What happens to the activity of an enzyme as the temperature is increased?
It increases
It decreases
It increases to a maximum, then decreases
Which statement about the optimum pH of an enzyme is correct?
It is the pH at which the enzyme's activity is greatest.
It is the same for all enzymes.
It is the pH at which the enzyme cannot be damaged by heat.
Which molecule partially fits into an enzyme, reducing enzyme activity?
Substrate
Complex
Inhibitor
Higher tier only
What are the finger-like projections in the ileum called?
Alveoli
Villi
Ileum
The lacteal absorbs...
Sugars