Digestion Enzymes

Question 1

What 3 main food groups need to be digedsted?

Answer 1

Carbohydrates (starch, protein and fats.

Question 2

Carbohydrates (starch):
What are they broken down into?
What elements are present in it?
In which types of food can you find it? (put 3 examples)
Which enzymes digest it?
Where is it digested?

Answer 2

• simple sugars
• CHO
• potetoes, bread, rice
• amylase
• mouth, small intestine

Question 3

Lipids (fats)
What are they broken down into?
What elements are present in it?
In which types of food can you find it? (put 3 examples)
Which enzymes digest it?
Where is it digested?

Answer 3

• fatty acids
• CHO
• butter, margarine, oil
• lipase
• small intestine

Question 4

Protein
What are they broken down into?
What elements are present in it?
In which types of food can you find it? (put 3 examples)
Which enzymes digest it?
Where is it digested?

Answer 4

• amino acids
• CHON
• fish, meat, eggs
• pepsin, trypsin
• stomach, small intestine

Question 5

What are enzymes?

Answer 5

They are biological catalysts that speed up chemical reactions, without being used up.

Question 6

What are the properties of enzymes?

Answer 6

• made of protein
• is specific to a substrate
• not used up (can be reused)
• have optimum temperatures and pH’s.
• at high temperatures they become denatured.
• act as catalysts (speed up chemical reactions)

Question 7

What is catalase?

Answer 7

It is an enzyme found in every living cell.

Question 8

What does catalase break down?

Answer 8

It is not involved in digestion but instead speeds up the brek down of a cell toxin called hydrogen peroxide into water and oxygen.

Question 9

Enzyme equation for catalase:

Answer 9

catalase

Hydrogen Peroxide —————> Water + Oxygen