Nutrition in Dairy Products

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Questions and Answers

Which of the following statements accurately describes a characteristic of casein?

It is soluble in water at low pH.

It is rich in phosphorus and forms micelles. (correct)

It is rich in sulfur-containing amino acids.

It is the primary protein found in egg whites.

What is the isoelectric point of casein, the dominant protein in cow's milk?

pH 6.2

pH 3.8

pH 7.0

pH 4.6 (correct)

What is the approximate percentage of total milk protein that casein constitutes in cow's milk?

45%

55%

62%

79.5% (correct)

Which of the following statements is NOT true regarding casein in milk?

Casein is less nutritious than whey protein. Signup and view all the answers

What happens to casein when milk is acidified to its isoelectric point?

It precipitates out of solution. Signup and view all the answers

What is the primary reason colostrum milk has a higher nutritional value compared to normal milk?

It is rich in vitamins and minerals. Signup and view all the answers

How does the vitamin A content in colostrum milk compare to that in normal milk?

It is 30 times greater. Signup and view all the answers

What factor significantly distinguishes colostrum milk from normal milk regarding mineral content?

Colostrum is significantly higher in minerals like calcium and phosphorus. Signup and view all the answers

In terms of protein composition, how does colostrum’s globulin fraction compare to regular milk?

Globulin fractions are 10 to 17 times higher. Signup and view all the answers

What is the pH level consideration when evaluating colostrum milk versus normal milk?

Colostrum has a lower pH than normal milk. Signup and view all the answers

What is the significance of the isoelectric point of proteins in camel milk?

It determines the solubility of proteins in water. Signup and view all the answers

Which characteristic of whey protein is most relevant when comparing camel milk protein to cow milk protein?

Whey proteins are rapidly digested and absorbed. Signup and view all the answers

What nutritional component of camel milk is similar to human milk?

Protein profile. Signup and view all the answers

How does the casein to whey protein ratio in camel milk compare to that in cow milk?

Camel milk has a lower casein ratio than cow milk. Signup and view all the answers

What is the pH level of human milk and why is it important?

7.15; it optimizes nutrient absorption. Signup and view all the answers

Study Notes

Human pH

Human pH is 7.15

Camel Milk

Camel milk has a protein profile similar to human milk.
Camel milk is a suitable substitute for cow milk in infant formulas.

Colostrum Milk

Colostrum milk has a higher concentration of SNF (Solid Non-Fat) than normal milk, particularly globulin fractions (proteins).
Colostrum milk contains higher levels of minerals, including calcium, phosphorus, magnesium, chlorine, and iron.
Iron levels in colostrum milk are 10 to 17 times greater than in normal milk.
Vitamin A levels in colostrum milk are 30 times higher than in normal milk.

Casein

Casein makes up the dominant protein class in cow's milk (79.5% of total protein).
Casein precipitates when the pH is lowered to 4.6 (isoelectric point).
Casein is rich in phosphorus due to its phosphoprotein composition.
Casein exists within molecular complexes known as casein micelles.

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Description

This quiz explores key insights into human pH, camel milk, colostrum milk, and casein proteins. Learn about the nutritional benefits and unique characteristics of these milk types. Perfect for students in nutrition or biochemistry courses.