Principles of Dairy Sciences Quiz
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Questions and Answers

What is the main constituent of milk?

  • Water (correct)
  • Fat
  • Protein
  • Carbohydrate

Which animal's milk is commonly used for processing dairy products?

  • Goats
  • Sheep
  • Buffalo
  • All of the above (correct)

What are simple saccharides with 1 or 2 molecules commonly called?

  • Monosaccharides (correct)
  • Polysaccharides
  • Oligosaccharides
  • Disaccharides

Which molecule is referred to as a sugar and is important in food and health?

<p>All of the above (D)</p> Signup and view all the answers

What is the gross composition of cow's milk in terms of water content?

<p>85% (B)</p> Signup and view all the answers

Which component of milk is made up of 3.4% in cow's milk?

<p>Protein (C)</p> Signup and view all the answers

What type of bond must be broken before the sugars in disaccharides can be used by the body for energy?

<p>Glycosidic bond (B)</p> Signup and view all the answers

Which disaccharide is predominately found in milk?

<p>Lactose (B)</p> Signup and view all the answers

What undesirable reactions can occur between lactose and protein in milk when exposed to higher temperatures?

<p>Maillard reactions (B)</p> Signup and view all the answers

What are triglycerides composed of?

<p>Three fatty acids attached to a glycerol backbone (B)</p> Signup and view all the answers

What are mono- and diglycerides used for in food products?

<p>To keep fat and water from separating (A)</p> Signup and view all the answers

What is the most complex fatty acid composition among edible fats?

<p>Milk fat (D)</p> Signup and view all the answers

Which type of fatty acid has each carbon bonded to another carbon and 2 hydrogen atoms?

<p>Saturated fatty acid (B)</p> Signup and view all the answers

What is the primary type of carbohydrate found in milk?

<p>Lactose (B)</p> Signup and view all the answers

What percentage of milk is approximately made up of total fat?

<p>~3.4% (C)</p> Signup and view all the answers

What are the 3 sugar molecules in disaccharides bonded together by?

<p>Glycosidic bond (D)</p> Signup and view all the answers

Study Notes

Composition of Milk

  • Milk is primarily composed of water, accounting for about 87% of its total volume.
  • Cow's milk is the most commonly used animal milk for processing dairy products.
  • The main carbohydrate in milk is lactose, a disaccharide formed from glucose and galactose.

Carbohydrates in Milk

  • Simple saccharides with one or two molecules are referred to as monosaccharides and disaccharides, respectively.
  • The fundamental sugar important in food and health is glucose.
  • Disaccharides must have their glycosidic bonds broken for the body to utilize the sugars for energy.

Sugars and Fat Composition

  • Lactose is the predominant disaccharide found in milk.
  • Undesirable reactions, such as the Maillard reaction and caramelization, can occur between lactose and proteins when milk is heated to higher temperatures.
  • Triglycerides, the main fat component in milk, are composed of glycerol and three fatty acid chains.

Lipids in Dairy

  • Mono- and diglycerides are often used as emulsifiers in food products to improve texture and stability.
  • Milk has a complex fatty acid composition, with some edible fats showing greater diversity than others.
  • Saturated fatty acids have each carbon atom bonded to two hydrogen atoms and another carbon.

Nutritional Composition

  • Total fat constitutes approximately 3.5% to 4% of cow's milk.
  • Disaccharides in milk are formed by bonding three sugar molecules (monosaccharides) through glycosidic linkages.

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Test your knowledge of dairy science principles, including the production and processing of dairy products from raw milk. Explore the rich sources of energy provided by dairy products.

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