Dairy Products

Question 1

What is the definition of milk?

Answer 1

The lacteal secretion, practically free from colostrum, obtained by the complete milking of one or more healthy cows, which contains not less than 3.25% of milkfat and not less than 8.25% milk-solids-not-fat

May be from cow, goat, or sheep.

Question 2

What is the average composition of water in milk?

Answer 2

87.3%

Question 3

What is the composition of lactose in milk?

Answer 3

4.9%

Question 4

What is the composition of fat in milk?

Answer 4

3.7%

Question 5

What is the composition of protein in milk?

Answer 5

3.4%

Question 6

What is the composition of ash in milk?

Answer 6

0.7%

Question 7

Are other components dissolved or suspended in water in the milk?

Answer 7

Yes

Question 8

What is disaccharide?

Answer 8

Glucose & galactose

Question 9

Is lactose the least variable component in healthy animals?

Answer 9

Yes

Question 10

Is milk fat the most variable component?

Answer 10

Yes

Question 11

What is the percentage of triglycerides in milk fat?

Answer 11

98-99%

Question 12

What is a triglyceride?

Answer 12

Lipid

Question 13

What is a lipid used for?

Answer 13

The breaking down of lipase.

Question 14

What is almost all animals milk stored in the form of?

Answer 14

Triglycerides

Question 15

Can milk be oxidized by UV lights?

Answer 15

Yes

Question 16

Milk fat has a 1-2% mixture of what?

Answer 16

Mono- and diglycerides, phospholipids, sterols, carotenoids, and vitamins

Question 17

At what point does milk curdle?

Answer 17

When pH drops below normal.

Question 18

What is pH used for?

Answer 18

Measures acidity.

Question 19

What is casein?

Answer 19

Protein found in milk

Question 20

What percentage of milk is casein?

Answer 20

80%

Question 21

What is an example of an enzyme?

Answer 21

Lipase

Question 22

What is rennin?

Answer 22

How a calve or lamb breaks down casein in the stomach.

Question 23

What is ash?

Answer 23

A mineral content in milk. A non-combustible matter.

Question 24

What is the acidity of ash?

Answer 24

6.5-6.7

Question 25

Why do aquatic animals have higher protein in their milk?

Answer 25

Their cooler environment.

Question 26

What is the purposes of heat treatment?

Answer 26

Destroy pathogens. | Coxiella burnetti

Question 27

What is HTST?

Answer 27

High temperature short time

Question 28

What is the most common HTST?

Answer 28

161F for 15 secs. | Most economical

Question 29

Does homogenization have to be combined with heat treatment?

Answer 29

Yes

Question 30

What happens when you combine homogenization with heat treatment?

Answer 30

Destruction of Ig-M and native lipase.

Question 31

Lactose is digested by what?

Answer 31

Lactase

Question 32

What is fat in the form of?

Answer 32

Triglycerides

Question 33

What is PI?

Answer 33

Isoelectric Point