B3 Organisation & The Digestive System Flashcards
Proteins are digested using enzymes called…
proteases.
pepsin is an example
The digestion of protein produces…
amino acids
A person’s diet should contain carbohydrate, fat and protein. Give a reason for each food type.
Carbohydrates for energy.
Fat for energy and insulation.
Protein for growth and repair.
Why does the body need vitamins and mineral ions?
Health.
To prevent deficiency diseases
Compared to the mass of carbohydrates, the body needs ____ mass of vitamins and mineral ions.
Complete the sentence with:
a greater / a smaller / the same
a smaller
How can you tell if two variables are directly proportional from their graph?
Their graph must be
a) a straight line
b) through the origin
Enzyme controlled reactions are used in industry. The rate of reaction can be increased by either increasing the concentration of enzyme or increasing the temperature.
Why might it be preferred to only increase the temperature?
To save costs as the enzyme may be very expensive.
Why is baby food pre-treated with protease enzymes?
So the food is softer, as the protease enzymes break down the protein into amino acids.
Apart from protease enzymes, give one other use of a named enzyme in industry.
Carbohydrase for making sugar syrup.
Lipase for removal of grease stains.
Carbohydrates are digested using enzymes called…
carbohydrases.
amylase is an example that breaks down starch
Lipids (fats and oils) are digested using enzymes called…
lipases.
The digestion of carbohydrates produces…
simple sugars e.g. glucose.
The digestion of lipids (fats and oils) produces…
fatty acids and glycerol.
